Production Performance Analysis and Productivity Prediction of Horizontal Wells in Mahu Tight Conglomerate Reservoirs：A Case of Ma 131 Dense-Spacing 3D Development Pad

doi:10.7657/XJPG20220409

Abstract

Abstract:

In order to clarify the productivity and production performance of Ma131 dense-spacing 3D development pad,the production characteristics and unstable production/productivity were predicted,a workflow for performance analysis and productivity prediction was established,and the key parameters such as equivalent formation permeability and effective fracture half-length,etc. were determined for single well productivity prediction. Oil in the target reservoir is easy to be degassed,which may be effectively alleviated by running the gas nozzle into the hole in the early stage. The use of over-sized oil nozzle in the early stage of flowback may greatly decrease the fracture volume; in this case,a pressure-managed flowback is necessary. The P50 productivity prediction results obtained from the production decline curves and the analytical model can complement each other,providing a more accurate and reasonable productivity prediction interval. The average effective fracture half-length of horizontal well in T₁b₃ is greater than that in T₁b1 2; therefore,the well spacing can be further optimized.

Key words: Mahu oilfield, tight conglomerate reservoir, effective fracture half-length, equivalent formation permeability, single well controlled reserves, performance analysis, productivity prediction

CLC Number:

TE331

CAO Wei, XIAN Chenggang, WU Baocheng, YU Huiyong, CHEN Ang, SHEN Yinghao. Production Performance Analysis and Productivity Prediction of Horizontal Wells in Mahu Tight Conglomerate Reservoirs：A Case of Ma 131 Dense-Spacing 3D Development Pad[J]. Xinjiang Petroleum Geology, 2022, 43(4): 440-449.

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