Drawing is a very important link of digital processing in geophysical prospecting. Especially in scientific research, drawing up of the results of experiments with a new method is a necessary means to testify the new method and select the parameters. We have chosen the commonest IBM microcomputer and its outer equipment, exploited its drawing function, and compiled for geophysical prospecting drawig a special software, by means of which most pictures needed in scientific research and teaching can be drawn. After being used in practice,it has proved to be highly effective.
In consideration of the practical transient flow of complex branch-like pipeline network on loop, it is the first time that we have presented in this paper the mathematical model, which is a system of partial differential equations with initial conditions and boundary conditions, an initial-boundary value problem. We have proved that the solution of the initial-boundary value problem is existent and unique by the theory of semigroups of linear operators, and we have obtained the solution in wider sense with the operator series method.
According to the comprehensive analysis of light hydrocarbon composition of condensates, carbon isotopic composition of methane and its homologues，fingerprint correlation of natural gases with absorbed gases of source rocks, assemblage features of double-cycle serquiterpenes and geologic framework, this paper demonstrates that oil and gas in most O and C-P condensate gas reservoirs mainly come from humic organic matter of C-P coal seams and are mixed with a portion of oil and gas from Paleogene. The authors analyze the characteristics of hydrocarbon generation in C-P, and suggest that gas generation is main，oil generation is subordinate，and original gas-oil ratio is more than 100Cm3/t in general within vitrinite reflectance values of 0.6% —1.3%,The basic formation conditions of O and C-P condensate gas reservoirs are both the characteristics of hydrocarbon generation in C-P coal organic matter during mature stage anp the favorable geologic conditions for oil and gas accumulation.
A method of deconvolution with discrete Fourier transform is discussed in this paper. Compared with other methods of deconvolution (Z transform method and least square method)，this method has three advantages:1 .High precision;2 .Less operations;3. No supposition that the seismic wavelet is minimum phase.
The application of artificial intelligence to well test interpretation is a new subject, The study of it is at the initial stage both at home and abroad. This paper describes the development of an Expert System prototype for the reservoir model identification in well test interpretation (RMIESWT), The model chosen by computer is based on the pressure derivative curve, and simulates the visual diagnosis performed by a human expert. A part of the reasoning involved in such a diagnosis uses a symbolic representation of the derivative curve，which，in the case of a human expert，is built almost unconsciously, Therefore，it is a very good simulation technique of artificial intelligence. Besides test data, the system seeks additional information available from other sources, such as drilling，production, well logging，coring，fluid sampling，enhanced recovery treatment and geology，to identify a reservoir model, which is particularly available to the incomplete test data. The expert system tool CM.1 is chosen as an expert system environment, which is a current tool，based on rules. The knowledge base is organized in a hierarchy of sub-problems whose logical relations are clear and easy to understand. Any rule and the certainty factor of the rule can feasibly deleted, inserted and changed in the knowledge base. During the consultation session between a user and the expert system, all the displays are in a way of the menu and in Chinese, The system is easily acceptable for the users in oilfield.
A new method of numerical presented in this paper，and an simulation for condensate oil-gas reservoir equation-of-state multicomponent model is set up by using pseudo-component theory, The formulation of the physical and given in this mathematical modeling，the parameter treatment and problem，solution paper. Its reliability having been tested by means of an example of the SPE 4272, a series of results are obtained by using the simulation calculation for Su 1 Qian Shan condensate oil-gas reservoir,
This paper has studied the characteristics of pressure fall-off curves for water injection well in double media reservoir by using the numerical simulalion method，analyzed the influence of imbibition constant and imbibitions halflife on pressure fall-off curves，and finally suggested a method of analysis of those curves
The oscillating-pulse jet-nozzled bit having been tested in eight oil fields，evident economic benefits have been obtained. The penetration rate of an oscillating-pulse jet-nozzled bit has been raised by 6.70一77.60%，and the footage raised by 6.70-44.10%compared with those of a common nozzled bit. The drilling cost of 808.9 thousand Yuan has been saved by only 57 bits tested.
Based on a vast number of results from dynamic cake fluid-loss experiments made by others，this paper has given a model for more accurately calculating fluid-loss velocity, where the influence of many factors，such as real pressure differences exerted on three zones(cake, filtrate and reservoir)，viscosity of fluid, shear velocity in the fracture, and the frontal movement of the filtrate fluid are taken into consideration, The model can be used to calculate fluid-loss velocity in the design of a pad fluid acid fracturing or hydraulic fracturing treatment.
According to the mathematical theory of analytical space geometry， the paper has established the mathematical relationship between the sectional area and volume of the scoop-shaped tooth of three-cone bit and the depth of tooth penetrating rock. The mathematical relationship has provided the standard for the study of the size of bit teeth breaking rock，laid the foundation for the computer imitation of three-cone bit，and provided the unprecedented reference materials for the people working on bit research as well.
This paper has introduced a set of test device to examine the loads on teeth of the bit at different rotary speed and under high bit-weight, The design of the test device has been proved to be successful through testing. The writer has completed many kinds of tests of loads on teeth of the bit at proper rotary speed and under different bit-weight. Some laws of change in load on bit teeth under low to high bit-weight have been found by processing and analyzing a great many test data.
By studying the an approach to the shape of bottom-hole pattern, the paper has mainly made an approach to the bottom-hole pattern characteristics, presented a group of characteristic parameters, and the type of rock bit by fuzzy cluster. The results calculated by forecast equation of drilling speed，cone gear ratio etc. have accorded with those from experiments.
This pager presents the effect of three models for large tank foundation upon the stress calculation of tank shell. The calculated results show that the different models for tank foundation greatly influence the shear edge force Qo and the bending moment M，but not so much the value of the maximum stress in the shell，Two methods on elastic half space solution agree with sand or smaller sand foundation, However，the model of separate spring foundation is more suitable for the foundation supported by a concrete ring wall, The necessity that Q and M should be calculated more exactly by selecting appropriate models is also stated in this paper.
FMDCP optimization method is a new complex algorithm. The reflecting direction is formed by using weighted centroid. The basic point of one dimensional search is determined by the monotony analysis. The exact minimum point along the search direction is found by using high effective one dimensional discrete search method. A lot of mathematical and engineering problems are solved optimally by this method，which is good in efficiency and reliability, and is especially suitable for engineering problems.
This paper discusses the method of collection and processing of data in measuring the indicator diagram of internal-combustion engines by means of microcomputer. The technique of software is used to measure the indicator diagram of internal-combustion engines and calculate its thermodynamic parameters，It is characterized by precision and rapidity.
This paper extends DC and AC Josephson equations from a single Josephson junction to any number of junctions in the linear "chain" using G.L .phenomenological theory and B.C.S theory, i.e, it demonstrates theoretically that one Josephson "chain" can be treated as one single Josephson "junction".
In this paper, we have proved some new coupled fixed points of mixed monotone operators without assumptions of continuity and compactness, improved and generalized some recent results obtained by Guo Dajun, V. Lakshmikantham (Nonlinear Analysis，Vol.11, No.5, 1987,623-632).
