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Table of Content
20 February 2004, Volume 26 Issue 1
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地质勘探
PROBING RESEARCH OF CRUDE OIL NOBL GAS FROM THE JIUXI BASIN
LI Xiu-fen ZHANG Xiao-bao MA Li-yuan.
2004, 26(1): 1-4. DOI:
10.3863/j.issn.1000-2634.2004.01.001
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The noble gas isotope of 8 crude oil samples of the Qingxi oil field in the Qingxi depression and Yaerxia oil field in the Southern uplift in the Jiuxi basin was measured. He source of the crude oils was discussed. The 3He/4He(Rc)ratios of the crude oil noble gases from 4 wells in the Qingxi oil field, the 527 well and the 702 well in the Yaerxia oil field reach an order of 10-8,indicating a crust radioactive source. This shows that the overthrusts related to the Qingxi oil field and the 527 well and the 702 well in the Yaerxia oil field cut into the depth of the crust. The 3He/4He(Rc)ratios of the crude oil noble gases
from the 501 well and the 114 well in the Yaerxia oil field is up to an order of 10-7, showing the input of a minor amount of mantle-derived helium and the cutting depth of the overthrusts associated with the two wells into the mantle. The geothermal flow of the Jiuxi basin is lower than that of the basins of eastern China, displaying that the basin has weak tectonic activity.
ANALYSIS OF THE BASEMENT SUBSIDENCE OF THE CENOZOIC OVERBURDEN OF THE WESTERN KUQA DE-PRESSION
CHEN Shu-ping; TANG Liang-jie; JIA Cheng-zao et al.
2004, 26(1): 5-8. DOI:
10.3863/j.issn.1000-2634.2004.01.002
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Based on the sandstone and mudstone percentage obtained from the relationship of interval seismic velocity to these and other parameters required, the total subsidence and tectonic subsidence were computed to the basement of the overburden.The subsiding curves could be categorized as two types, concave and convex, based on their shape. The former is the character-
istics of the subsiding curves of the depression near the North Monocline, and the later the other tectonic belts of the Kuqa depression. Subsiding velocity changes of different evolutionary stages show the coupling between the Kuqa depression and the Tianshan mountain. Based on the relationship between the total and tectonic subsiding curves, the convex subsiding curves can
be further divided into two secondary types: harmonious and disharmonious. The later shows salt flow, which happened a-long the south limb of Kelasu tectonic belt.
THE RESOURCE OF NATURAL GAS IN CHINA
LIU Cheng-lin; LI Jing-ming LI Jian et al.
2004, 26(1): 9-12. DOI:
10.3863/j.issn.1000-2634.2004.01.003
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On basis of a lot of statistics, natural gas resource of China is studied from its type, accumulation, and distribution. First, the history of exploration of conventional gas is divided into four stages, the reserves of conventional gas have been improved three step types and the reserves of conventional gas are mainly distributed in the six major basin. Second, the reserves of con-
ventional gas are mainly distributed in sea basin of East, Mid-dle, Northern-Western. The conventional gas resource in China is with features of old strata, low richness, and low proved rate. Third, the resource of coalbed Methane of China is mainly distributed in Eastern, Middle, and Northern-Western China.
Fourth, general tight sandstone gas and deep basin gas is two different types of tight sandstone gas. There is the superior fac-tor to form deep basin gas and there is much resource of deep basin gas. Fifth, South China Sea, East China Sea, Tibet Pla-teu, and North-East China are rich in natural gas hydrate.
Sixth, there is a lot of formation water in petroleum basins in China, where water soluble gas is largely existing. In the end,shale gas, deep source gas, CO2and H2S resource are plenty,which should not be neglected in China.
THE STUDY OF THE OIL-BEARING CHARACTERISTICS OF DA’ANZHAI OIL RESERVOIR
TANG Hong
2004, 26(1): 13-15. DOI:
10.3863/j.issn.1000-2634.2004.01.004
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Da’anzhai oil reservoirs are the chief production zones of Chuanzhong oil field. Most of oil and gas are from the Da’anzhai carbonate formation. With the long time past, the out-put decreases and some wells are even exhausted. So it is much necessary to study the oil-bearing characteristics and predict the output. In the paper, the reservoirs are classified into three
types by oil productivity: dry zones, low production zones and high production zones. The qualitative characteristics of the dif-ferent types are reduced according to the information of well logging, geology and production test, and the models of produc-tion formation are set up. Eventually, the methods are formed,which is used to select pay zone and predict the productivity.
APPLYING SOURCE VESSEL TO UNDERSHOOTING IN3-D MARINE SEISMIC SURVEY
LU Jun ZHANG Bai-lin YANG Kai
2004, 26(1): 16-18. DOI:
10.3863/j.issn.1000-2634.2004.01.005
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During the process of acquiring 3-D seismic data, there wil be platform, reef or small island in the work area sometimes.Undershooting is a good way to acquire the data of that obsta cle. By principle of acquiring 3-D seismic data, it is acceptabl to get enough data of underground in the explore surface if th
data with enough coverage and the gridnet of geophone is satified the 3-D sampling principle. The principle of undershootin and the configurations of source and navigation system and in stallation of near field hydrophone of source vessel have been explained. In practice, source vessel with this way has gotten excellent effect.
石油与天然气工程
A NEW METHOD OF WELL STRUCTURE DESIGN BY SALT ROCK CREEP PRESSURE PROFILE
LIU Hui-xin ZHANG Peng XIONG You-ming.
2004, 26(1): 19-22. DOI:
10.3863/j.issn.1000-2634.2004.01.006
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The effect well construction investing risk is a general problem in the world. The key of the study of the well structure design considering the salt creep is the design idea must be changed. In order to satisfy the salt formation, it should be considered two factors: one is the salt creep pressure profile; the
other is the salt creep well pressure curve. Finally, the reasonable well construction will extend the well life and the synthetical economic benefits will be obtained. According to the results of the study of the salt creep rules, the results of the well con struction were successfully applied in Tarimy Qiucan Well 1.
TRANSIENT PERFORMANCE PREDICTION OF HORI-ZONTAL WELL WITH COUPLED IN WELLBORE AND RESERVOIR PART1: MATHEMATIC MODEL
DUAN Yong-gang CHEN Wei HUANG Cheng et al.
2004, 26(1): 23-25. DOI:
10.3863/j.issn.1000-2634.2004.01.007
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It is an important base for the analysis to reservoir engineering and the design for the oil production method to how tpredict the productivity of the horizontal well accurately. For it self theoretical limitation, there is the serious error on the commonly method to predict the stable productivity. This paper i
based on the unsteady flow theory and looks on the reservoi flow and wellbore flow of horizontal well as a coupling system.The transient flow mathematic model under the coupling of th reservoir and wellbore was established. It has considered som complicated factor, such as the fluid friction loss, the change omomentum, the inflow of the sidewall of wellbore etc. Th
model is based on boundary integral method and can assembl with any reservoir model. It will provide the advanced metho for horizontal well to research reservoir engineering, the wel completion and oil production design.
TRANSIENT PERFORMANCE PREDICTION OF HORI-ZONTAL WELL WITH COUPLED IN WELLBORE AND RESERVOIR PART2: COMPUTABLE MODEL
HUANG Cheng CHEN Wei DUAN Yong-gang et al.
2004, 26(1): 26-28. DOI:
10.3863/j.issn.1000-2634.2004.01.008
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Based on coupling wellbore and reservoir, the forecasting-productivity model of the horizontal wells were presented by
Duan Yong-gang and Chen Wei, and that Cinco’s method to calculate transient pressure of finite conductivity vertical frac-tures well, this paper found a predicting productivity calculation
model and formulas in Laplace space, for the convenient and the practicality to apply in oil field.Therefore, it could apply a great deal of existent flow models of the horizontal wells and it’s pressure solution in the reservoir models. By iterative solution,some important information would be obtained such as the flow flux and pressure drop in wellbore etc.
TRANSIENT PERFORMANCE PREDICTION OF HORI ZONTAL WELL WITH COUPLED IN WELLBORE AN RESERVOIR PART3: CASE ANALYSIS
CHEN Wei DUAN Yong-gang HUANG Chenget al.
2004, 26(1): 29-31. DOI:
10.3863/j.issn.1000-2634.2004.01.009
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This paper applied the transient performance prediction model of horizontal well with coupled wellbore and reservoir that was found by Duan yong-gang etc to calculate and verify the model according to the result. The calculated results indi-cated that the effect of the horizontal well and reservoir form
and parameters are fully considered in the model. In the hori-zontal well, because the frictional drop is far bigger than accel-eration drop, in the fact application we can ignore the effect of acceleration of liquid in the wellbore. The horizontal well has an optimal horizontal length range. We can rapidly find out the op-timal length by using the coupled model. The coupled model de-
veloped had finer extended capability and provides a universal mode for reservoir engineering studies in different condition.
IMPROVED GAS FLOW EQUATION IN LOW PERME ABILITY RESERVOIRS
WANG Bin MEI Hai-yan ZHANG Mao-lin et al
2004, 26(1): 32-34. DOI:
10.3863/j.issn.1000-2634.2004.01.010
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Darcy’s law, the principle law through porous media, put forward one hundred years ago, was derived by experiments with liquid. For gas flow in porous media, a slippage effect ex-ists, especially when pressure is low, or velocity is low or per-meability is low. Gas flow equation in porous media with a slip-page effect was presented, combining with molecular diffusion
theory. It is a theoretical foundation for further study on per-meable theory, reservoir engineering, and performance analysis in low gas permeability reservoirs.
STUDY OF THE REASONABLE RATIO OF SPACE BE-TWEEN WELLS AND ROWS IN LOW PERMEABILITY RESERVOIRS
LI Zhong-xing HAN Hong-bao CHENG Lin-song.
2004, 26(1): 35-38. DOI:
10.3863/j.issn.1000-2634.2004.01.011
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Based on fluid flowing through porous media mechanisms and the geologic characteristic of exploitation, 102 geologic models were established in low permeability reservoir of Changqing oil field in this paper. Using numerical simulation,102 schemes were designed and calculated in rhomboidal and
rectangular well patterns. A theoretical plate of reasonable ratio of space between wells and rows in different well patterns were studied, and different anisotropy degree formations of low per-meability reservoirs were determined. Through the theoretical plate, the reasonable ratio of space between wells and rows was easily acquired. All these things will provide theoretical supports
for designing the exploitation schemes.
REMIND OIL DISTRIBUTION AND IMPROVEMENT PRO DUCTION POTENTIAL STUDY ON HIGH WATER CU COMPLEX FAULT BLOCK OIL RESERVOIR
TU Xing-wan; CHEN Lin-yuan; MUO Wen-li et al.
2004, 26(1): 39-42. DOI:
10.3863/j.issn.1000-2634.2004.01.012
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The oil remaining distribution is complicated in high water content ratio continental facies complex fault block oil reservoir, so the reservoir simulation is difficult. In this paper, the dy-namical static data was obtained based on the reservoir detailed description of Ma 11, the result combined with thick gridding
simulation to study the oil reaming distribution. Aimed at the reservoir oil remaining specialty and economic technology, put into effect the plan of the improvement the oil remaining pro-duction potential which consisted of the adjustment well, profile modification, water plugging, well major repair etc. Now, the
reservoir water cut smart decline, oil recovery rate is climb and
the recovery ratio improve 0.7 percent. The fact proved, this means improves the precision and reliability of oil remaining dis-tribution study.
RESERVOIR CORE POROSITY AND POROSITY DISTRI-BUTION MEASUREMENT USING TECHNOLOGY OF-RAYS INDUSTRIAL COMPUTERIZED TOMOGRAPHY
YI Min HUANG Rui-yao SUN Liang-tian et al.
2004, 26(1): 43-46. DOI:
10.3863/j.issn.1000-2634.2004.01.013
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This paper put forward a ICT (Industrial Computerized Tomography) measuring way of density difference which mea-sures the porosity distribution of reservoir core for the further studying of porous structure and the porosity distribution using technology of ICT, and the measuring way have been applied to measure the porosity and porosity distribution of a core sample
from certain oilfield. The result indicates that the CT density difference method is effective to measure the porosity distribu-tion. The method is faster and more accurate than conventional methods, and it has also the merit, such as no damage to core sample and similar to formation condition. Therefore, it is an advanced method for measuring the rocks properties and follow-
ing the tracks of formation fluid.
CONTRASTING AND ANALYZING THE UTILITY ARITH-METIC FOR CALCULATING THE Z-FACTOR OF SOUR GAS
WANG Zhou-hua;GUO Ping;LI Hai-ping;etal.
2004, 26(1): 47-50. DOI:
10.3863/j.issn.1000-2634.2004.01.014
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Based on a lots of literatures, the paper summarized the methods for calculating the z-factor of gas on the base of reading lots of related literature; and discussed the methods and process-es for correcting the systematic critical parameters due to the in-fluence of the CO2and H2S when calculating the Z-factor; final-ly the different results from different methods were contrasted and analyzed.
A NEW METHOD CALCULATING THE POSITION O SAND JAM IN THE FRACTURE
WANG Zheng-mao LI Zhi-ping LI Yun et al.
2004, 26(1): 51-53. DOI:
10.3863/j.issn.1000-2634.2004.01.015
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Sands can be jammed the fracture during the fracturing construction. If sands jam is effective, it can affect fracturing pressure. In order to exactly calculate the position of sands jam in the fracture, fracturing pressure can be analyzed. By drawing the double logarithmic curves of fracturing pressure and con
struction time, the data of pressure response could be obtaine after sands jam happened. By their linear regression, the slop of straight-line segment could be obtained. Then, the positio of sands jam in the fracture was calculated by the slope and correlative fracture parameter. It is very significant to correctly di
rect fracturing construction and obtain fracture with high quality.
EXPERIMENTAL RESEARCH ON POLYMER-FIXED TECHNOLOGY OF DOUBLE-FLUID METHOD AFTER POLYMER FLOODING
XU Ting LI Xiu-sheng ZHANG Xue-hong et al.
2004, 26(1): 54-57. DOI:
10.3863/j.issn.1000-2634.2004.01.016
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To the condition of water flooding after polymer flooding,due to improper mobility ratio, following water will quickly breakthrough the bank of polymer to production wells, which cause water cut in production wells in a short time. To solve this problem, polymer-fixed technology of double-fluid method has been put forward in this paper. Results show that applica-tion of the technology after polymer flooding could fully fix high concentration polymer in site and the formed gel system will ef-fectively plug these high permeability channels, impel following water to strata of medium and low permeability and improve the
oil recovery after polymer flooding. To restoring water flooding after polymer flooding, the technology of flocculating and poly-mer-fixed technology of double-fluid method can fully flocculate low concentration polymer and effectively fix high concentration polymer in site, which can plug effectively high permeability strata, improve greatly the water injection profile, the sweep
efficiency of succeeding water flooding and the oil recovery of water flooding.
油气化学工程与化工
DEVELOPMENT OF FOAM DIVERSION ACIDIZING MODEL
HUANG Ying-hui ZHAO Li-qiang CHEN Ji-mei et al.
2004, 26(1): 58-60. DOI:
10.3863/j.issn.1000-2634.2004.01.017
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Foam can efficiently divert acid into low-permeable and population formation to optimize acid placement. Foam diver-sion acidizing model has been developed form foam displacement simulation. The model currently includes critical capillary pres-sure model based on fractional-flow theory, bubble population
correlation and Robert-Mack model. Present foam diversion model in matrix acidizing are presented in this paper and further work and improvement in this field are discussed and put for-ward.
STUDY ON THE FORMULATION OF A FOAMED POLY-MER
YANG Jian-jun YE Zhong-bin SHI Lei-ting et al.
2004, 26(1): 61-64. DOI:
10.3863/j.issn.1000-2634.2004.01.018
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Based on analyzing the limitation of polymer flooding in practical application, a foamed polymer system has been proposed, which can be formed in situ and can solve the problem obypass when polymer flows through large channel alone. In order to determine a formulation of the foamed polymer, uniform
design, a method of experimental design, as well as the DPS software which can process the experimental data, have been used. So the primary factors of effecting the foamed polymer system have been obtained.
PERFORMANCE INFLUENCE FOCTOR AND PRACT OF FOAMED ACID
GUAN Fu-jia YAO Guang-qing LIU Jian-min.
2004, 26(1): 65-67. DOI:
10.3863/j.issn.1000-2634.2004.01.019
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In conventional acidizing to low permeability reservoir, the formation will be damaged again owing to the unthorough flow-
back of the spent acid, so foamed acid has been used. The per formance and influence factors of the foamed acid have been in troduced detailed in this paper, and some successful experiences in field have been listed, so that its excellent performance of can
be illuminated farther.
RESEARCH OF DISPERSANT FOR COLLOID POLYMER GRANULATION
ZHAO Pu-chun
2004, 26(1): 68-70. DOI:
10.3863/j.issn.1000-2634.2004.01.020
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A new formulation of dispersant has been developed by or-thogonal test method in laboratory. The dispersant is used to granulate a certain colloid polymer and composed of 10% tech-nical soap, 60% kerosene and 30% tap water. At the same time, its validity, the influence on the polymer performance, e-conomic benefit and so on, are considered. The new dispersant has the same granulation performance, operation method and u-nit volume (weight) for granulation as the ordinary one, and under the same conditions, it shows much better characters of homogeneous granulation.
石油机械工程及其它
CONTACT STRESS ANALYSIS OF THE DRILLING PUMP PISTON
XIA Yuan-bai JIANG Chun-mei L Zhi-zhong.
2004, 26(1): 71-74. DOI:
10.3863/j.issn.1000-2634.2004.01.021
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The seal and friction wear efficiency of the drilling pump piston mainly depended on the contact stress description be-tween the rubber seal ring and the inside hole of cylinder, so the research of contact stress has a realistic and important meaning.In the article, the contact stress description of piston was ob-tained in static and moving process by finite element method.At the same time, the contact stress description was analyzed under changing piston’s size and the pressure.
ANALYSIS OF THE RUPTURE AND OUT OF JOINT OF THE SUCKER ROD
CAI Jun-jie
2004, 26(1): 75-78. DOI:
10.3863/j.issn.1000-2634.2004.01.022
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The paper analyzed the cause of the sucker rod ruptured and out of joint rising continuous from the first oil plant of Henan oil field in detail. At the same time, this paper presented the techniques and managements to lessen the sucker rod rup-tured and out of joint which will produce some effect in reducing the maintenance of well repair and increasing the no-well repair
period.
SOFTWARE SYSTEM OF THE OIL-FIELD EXPLOITATION PROGRAMMING AND DECISION-MAKING
LIU Zhi-bin FU Qing-shan DING Hui et al
2004, 26(1): 79-82. DOI:
10.3863/j.issn.1000-2634.2004.01.023
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In order to solve the prediction of the development dynam-ic, the optimal structure of the oil-output, the optimal structure of the measure, the optimal collocation of the oil-output, the optimal control of the measure, the general programming scheme and so on, the software structure design and the data
flow was analyzed from the demand of the consumer. The mod-ule functional design was finished, and the software system of the oil-field development programming and decision-making was
written. Finally, the software system was successful in applying to many oil fields.
APPLICATION OF COMPASS WELLPLAN SOFTWARE IN DRILLING DESIGN AND FIELD PROCESSING
HUA Yuan-xin ZHANG Gui-qiang ZHU Wei-hong et al.
2004, 26(1): 83-86. DOI:
10.3863/j.issn.1000-2634.2004.01.024
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With the development of the oil field exploration, the quantity of the highly difficult well increases constantly, we had gotten COMPASS and WELLPLAN application software of LANDMARK to satisfy drilling design and field processing.The functions of these two sets of software are very strong.
They satisfied the highly difficult well design and field process-ing better in these two years. The level of drilling design and field processing was improved. The difficult problems that ex-isted originally in drilling have been solved. Production efficien-cy was improved, and the cost of drilling was reduced. The most important thing is that they can offer the reliable decision
for leadership, and turn science and technology into productivi-ty.