The Construction Method of Three-dimensional Dynamic Gas-driven Well Pattern in Fractured-vuggy Reservoirs

doi:10.11885/j.issn.1674-5086.2020.07.02.02

Abstract

Abstract: Gas injection in Tahe fracture-vuggy type reservoir has achieved good oil increase effect, but different gas driven well groups have great difference in oil increase effect, so gas driven well pattern construction technology is urgently needed to guide gas injection on site, so as to improve the proportion of gas injection affected well groups. However, there is no public report on how to construct and evaluate the gas driven well pattern. Based on the analysis of actual well pattern in different karst background and the understanding of gas injection and wave rule, the principle of constructing well pattern of gas-driven three-dimensional structure in fracture-vuggy reservoir is clarified. Factors influencing gas driven pattern can be divided into basic geological conditions factors and advantages and disadvantages of well pattern factors. Using the principal component analysis, basic geological conditions and the evaluation method of the three big background of karst has been established. We put forward the degree of gas driven control, gas drive utilization, gas driven the reserves, plane balanced degree of displacement, vertical displacement equilibrium degree and interleave degree of injection and production layers. Based on the six factors, effects on improving recovery degree, method and standard for quality evaluation of the influence of gas driven patterns. Considering the field practice, the dynamic adjustment method of gas channeling well group is proposed, and the well pattern construction method and flow chart of three-dimensional gas driven structure of fracture-vuggy reservoir are formed. The gas-driven well pattern construction method was applied to W-1 gas-driven well group, increased of 60, 000 tons of accumulated oil and the gas oil change rate of 0.6, verifying the feasibility of the method.

Key words: gas-driven well pattern construction, dynamic, three-dimensional space structure, geological conditions, advantages and disadvantages of well pattern, fracture-vuggy reservoir

CLC Number:

TE344

ZHU Guiliang, SONG Chuanzhen, ZHANG Hui, CHENG Qian, ZHANG Yun. The Construction Method of Three-dimensional Dynamic Gas-driven Well Pattern in Fractured-vuggy Reservoirs[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(6): 62-70.

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