Evaluation and Analysis of Engineering Geological Features Affecting Fracturing Effect in Block S

Abstract


 Reservoir evaluation and classification is an important content in oil and natural gas exploration and development. Reasonable and scientific evaluation of reservoirs has important guiding significance for the discovery of "sweet spots" in the later stage, the optimization of favorable areas and the optimization of fracturing stimulation measures in the later stage. , this paper evaluates and analyzes 6 engineering geological factors of reservoir rock compressibility, horizontal difference stress coefficient, reservoir interlayer stress difference, rupture pressure, closure stress and formation pressure coefficient in block S, and combines with the analysis of unimpeded flow after compression to find The favorable range value of each factor provides an important basis for the subsequent evaluation and analysis of other fracturing wells and the recommendation of fracturing process countermeasures. Based on the engineering geological factors that affect the fracturing effect, a new method for evaluating the geological quality of fracturing engineering is established, and the reservoirs with the comprehensive coefficient of fracturing engineering geological quality between 0.53 and 1 are regarded as high-quality A-level reservoirs. , the reservoirs with the comprehensive coefficient of fracturing engineering geological quality between 0.2 and 0.53 are regarded as the B-level general quality reservoirs, and the reservoirs with the comprehensive coefficient of fracturing engineering geological quality between 0 and 0.2 are regarded as the C-level poor quality reservoirs, which are selected for fracturing selection. Well selection provides an important basis.