Research and Application of Volume Fracturing Technology Fracture Control in Ning 209 Area

doi:10.11885/j.issn.1674-5086.2020.06.17.03

Abstract

Abstract: In order to solve the problems in shale gas development, such as limited fracturing volume, rapid production decline and low reserve production ratio, this paper puts forward volume fracturing technology of fracture control reservoir. By reducing the cluster spacing and increasing the number of fractures, the technology can increase the fracture control area, form a continuous control area, develop the reservoir three dimensionally, and greatly improve the primary recoverable reserves. Optimize the process design of the technology, optimize the perforation location by fine segmentation, optimize the number of perforations by perforation throttling, optimize the cluster spacing by seepage and stress interference, optimize the nanometer fracturing fluid by gas water replacement and increasing the amount of sand, optimize the proppant by effective pressure, and optimize the amount of temporary plugging agent by experimental regression. The optimization results are 6 clusters, 1 cluster of 6 holes×60°×6 holes/foot, cluster spacing of 6～8 m, and segment length of 40～50 m; using nanometer fracturing fluid system, nanometer slippery water polishing, nanometer linear glue continuous injected sand, the added sand strength is greater than 3.0 t/m; a combination of 70/140 mesh quartz sand +40/70 mesh ceramsite (3:7) with a small particle size used; the proportion of quartz sand is appropriately increased. This technology has been applied in Well 209X-x of Changning area, and the gas production converted to 1 500 m horizontal section is 26.6×10⁴ m³/d, which is 103% higher than adjacent wells. This technology has obvious stimulation effect and can provide reference for shale gas well efficient development.

Key words: shale gas, fracture control reservoir, volume fracturing, optimum design, nanometer fracturing fluid

CLC Number:

TE371

YUE Hong, YANG Zhaozhong, FAN Yu. Research and Application of Volume Fracturing Technology Fracture Control in Ning 209 Area[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 86-98.

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