Research and Application of Vertical Well Network Development for Small-Spacing Horizontal Wells in Tight Conglomerate Reservoirs in Mahu Area

doi:10.3969/j.issn.1006-6535.2023.02.017

Abstract

Abstract: In order to explore the overall fracturing effect of the multi-layered system vertical well network in tight oil reservoirs in the Mahu area and to improve the recovery degree of reservoir, a study on the three-dimensional spatial distribution characteristics of the ground stress parameters was conducted through an integrated geological engineering approach based on the construction of a three-dimensional geological model and a ground stress model, and the influence of inter-well and inter-cluster stress interference on the overall fracturing effect was analyzed, the optimal cluster distance, fracture length, fracture layout method and operation sequence were determined, and the optimized parameters for the development of vertical well pattern for small-well spacing horizontal wells were identified. The study shows that the vertical well pattern mode is adopted for development to optimize the cluster distance and a single cluster fracture scale. The zipper crossed arrangement of fractures can significantly improve the reservoir stimulation effect. The production degree of fracture-controlled reserves in the study area was increased from 70% to 90%. This study provides a reference for the development of stacked reservoir blocks with large oil thickness and good continuity.

Key words: vertical well pattern, stress interference, overall fracturing optimization, tight reservoirs, Mahu area

CLC Number:

TE355

Chen Yuxin, Zhao Ting, Cheng Ning, Ma Junxiu, Yang Shengfeng, Li Yunzhe. Research and Application of Vertical Well Network Development for Small-Spacing Horizontal Wells in Tight Conglomerate Reservoirs in Mahu Area[J]. Special Oil & Gas Reservoirs, 2023, 30(2): 122-127.

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