The new concept of pore throat-cavity junction and the rock pore throat-cavity junction model have been presented in this paper. A law of rock pore throat-cavity junction is obtained by means of computer modeling and mercury-injecting, and the pore throat-cavity theory is developed It is reported in this paper that the application of this theory to rock conductivity, permeability, mercuryinjection, residual oil saturation, reservoir recovery and so on is successful.
The sedimentary characteristics of Feixian Guan Formation in Lower Trassic System, Beipei area，have been discussed in this paper. It is believed that the carbonate deposit-dominated barrier system is similar to, but different from the terrigenous barrier system. Information in the paper fully shows the distinguishing features of geomorphologic units, sediment assemblages, hydro-dynamic conditions of the carbonate barrier. The purpose of this paper is to provide an example for recognition and division of the ancient carbonate barrier.
Electrofacies technology was introduced in 1980 by Schlumbeger well Surveying Corp, but it only provided the service. This paper uses a method of Fuzzy mathematics to set up a mathematical model of electrofacies different from that of schlumbeger well Surveying Corp. Satisfactory electrofacies for the long curves of zhong 50 Well have been obtained in Zhongba Gas Field NorthWestern Sichuan Province.
By applying the theory of Fuzzy mathematics to reservoir engineering and by selecting 20 characteristic indexes of reservoir and fluid parameters, this paper presents an analytic method of reservoir series division with Fuzzy classification in poly-reservoir development, Its application to certain condensed reservoir in Zhongyuan oil field results in contented results.
Time-dependent characteristics of the have been found experimentally. It can be residual resistance factor (FRR) visualized as an additional residual effect (FARE) produced by the retained polymer molecules while of the injection water is changed. And the additional residual the flow-rate effect factor (FARE) has been defined. Theoretical analyses based on comformation changes of the polymer molecules in a varying flow field indicate that polymer viscoelastic property is essentially responsible for this effect.
The turbulent flow of plastic fluids in smooth pipes has been studied by using the stochastic theory of turbulent flow, and the formulas have been presented for evaluating the time average velocity in the whole section of pipes，mean velocity and friction factor, The results obtained from the study have shown that the influence of the yield stress of plastic fluids on turbulent flow is determined by ，The influence will be soon reduced as Re(z) increases or the diameter of pipe red aces. The influence of the yield stress on the dimensionless velocity profile is very small.
The course of saturation of core with one side vacuumized and the other injected is studied in this paper. By analysing the test data and explaining the saturation course of cores of different permeabilities, a general regularity is obtained，which is of great significance to directing the core saturation in relevent experiments.
According to the Fuzzy mathematical principle，some Fuzzy factors are disposed of in the optimization design of suspended pipeline overhead-crossing，in whose calculation the pipe rigidity is concerned. The results obtained are more reasonable and satisfactory.
In this paper, suspended pipelines with definite rigidity which cross over deep valleys or rivet's are studied by the method of differential operator. According to boundary conditions, the equation of flexibility and the equation of bending moment are determined. And then the internal stress and deformation of the suspended pipelines are obtained. An example is used here to compare with the flexible suspended cables.
The feasibility and the method of connecting local networks in different departments of the SWPI are discussed. The problem of further connecting the local networks to computer Vax-11/780 in the computer center of the Institute are also approached in this paper.
By applying the theory of Markovian renewal process, this paper deals with the problems of how to determine the reasonable scale of storehouse and how to manage storehouse in a planned way. It is conducive to increasing production and practising strict economy.
By applying the regression analysis method，the relations between the abrasive wear volume of the friction surface material of a drilling of a drilling pump and its hardness，the piston material and the surface finish of the friction surface of the drilling pump are studied. The regression equation of the abrasive wear volume is set up. The working condition with minimum rate of wear is ascertained.
In South China reefs developed greatly in Middle and Late Devonian. The mian reef-building organisms were Stromatoporidas and some Tabulatas. According to the development degree of the reefs and the paleogeomorphic feature, they are classified as layer-reef and mound-reef . The development of the reefs tends to defer vertically from south to north little by little, and most of them are horizontally adjacent to the margins of the chief trench and of the epicontinental carbonate platform. The characteristics of the reefs are chiefly controlled by two groups of fractures at Westnorth，eastnorth，and by the factors such as the formed geomorphology of sea bottom characterized by platforms which were surounded by the trench, sea current，fresh water input etc.The Devonian sea of South China is of some main features of both epeiric sea and pericontinental sea.The ‘layer reef’ in South China is similar to the ‘low reef’ of Devonian period in Canada and the‘mound reef’ is similar to the‘high reef’of Devonian period in Canada and Devonian reefs in Germany.
In this paper, the basic characteristics of sedimentary tuff are introduced which has recently been discovered in Miyang Depression, Henan Province. The tuff consists of the basaltic debris, plagioclastics, hyaloclastic fragments, and silicated or chloritized interstitial materials, with the addition of minimal terrigenous quartzic and cherty clastics. Furthermore, the current cross lamination shown by abundant animal and plant remains contained in the rock indicates its transitional characteristics.The plagioelase in the basaltic debris and crystalloclastic plagioclase are classified into the albite or oligoclase.They are products of the albitization of more basic plagioclase during diagenesis.The sedimentary tuff occurs in the fan deltaic depositonal system in the Tertiary faulted basin，while pyroclastics in the sedimentary tuff are the syndepositional basic effusion under water.The southwest faults of Miyang Depression are boundary faults which stretch to the upper mantle.It is shown that they can provide passages of the emplacment and eruption of basic magma at some extensional stage.
This software has the functions of plotting the variable-area or nonvariable-area seismic profile from one to seventy-two channels. It provides a necessary and convenient display technique which will help users a lot in their research and development of some conventional and new methods of seismic data processing.Having been tested and used, the software has proved to have the feasibility and practicability.
It is obviously unreasonable that a few two-dimension models, which are used to predict the geometric shape of dynamic fractures developed by Geertsma, Klerk, Perkins et. al, don t consider the influence of temperature. Taking the influence of initial formation temperature and wellbore temperature into consideration, this paper first sets up a temperature field model in a fracture in which the leakoff rate is the function of temperature and time, then develops two types of models predicting the geometric shape that considers the temperature distribution in the fracture，and finally exemplifies the use ofall above models.All models presented in this paper are helpful to the fracturing operation practice，and give a way of real time stimulation of the dynamic fracture geometric shape by computors.
An experiment of displacement of gas by water by using an unsteady-state flow method and by forcing back pressure is introduced in this paper. According to Buckley-Leverett displacement theory, the relative permeability formula suitable for the displacement of gas by water is derived, and experiment data are obtained. It is of practical significance to the development and performance analysis of boundary bottom water gas reservoirs.
Starting with the analysis of motion of pumping units, we discussed in this paper the optimization of four-bar linkage parameters of beam-pumping units used in the field by the multiple-objective method——weighted-composed method, and presented reasonable parameter data for main-body design of various series of pumping units.
Having monitored the bed test and the wear test of materials of mud pump s liner/piston by the ferrography analysis technique, and analysed the wear debris in the mud used in the field, we discovered the debris produced during the wear process of liner and piston is mainly the normal wear debris, the wear debris characterized by fatigue and adhesion, and a bit of the cut wear debris. These three kinds of debris indicate that the wear between liner and piston is a composite form of fatigue wear, adhesive wear and abrasive wear.
Using kinetic simulation, we studied the conversion rate of Fe~(3+) to Fe~(2+) in acid fluid in the tubing. Then we discussed the general ways of preventing precipitation of iron compounds.
It would take much time to use the trial-and-error method introduced for solving the problem of the effect of shear deformation on the bending of a beam in Referrence 1. In particular, it is very difficult for the beginners to use. Here a new solution has been obtained whose concept is clear and deduction is strict. The results obtained are the same as those of trial-and-error method. In order to explain its application, some examples are given in this paper.
Retrieving light hydrocarbons is an efficient way to reduce the loss of crude oil in storage and transportation. At present, the rate of reclamation for light hydrocarbons is not so high because of people s ignorance of and poor level of management.In the article, some ways to solve the problems and measurements have been put forward from different points of view of economy, technical and administrative management in order to improve the future s work.
With the analytical method of the principles of dynamic interrelation in modern management science being used in the paper, the dynamic interrelation among the leaders, workers and the capital of petroleum enterprises is dealt with.A new model that all the members in the cnterprises should be fully responsible for the rental system has been presented and suggested in petroleum enterprises.The analytical method and the model of sysem innovation used in the article arc of general meaning.
