Application of geology-engineering integration in the development of tight gas reservoir in Sulige Gasfield

doi:10.3969/j.issn.1672-7703.2017.01.008

Abstract

Abstract: In the Sulige Gasfield with the basic geological features of low porosity, low permeability and low abundance, the development is challenging for low single-well production rate, fast pressure decline and other problems. In order to increase the single-well production rate and the recovery factor of gas reservoirs and realize efficient and high-quality development of blocks, a series of technical researches and field tests were carried out in Blocks Su 10, Su 11 and Su 53 based on the theory of geology-engineering integration. The geology-engineering integration is manifested in several aspects. Firstly, development mode of the block was determined. In Block Su 10, vertical wells and cluster wells were adopted for development, with inter-well productivity replacement. In Blocks Su 11 and Su 53, cluster wells and horizontal wells were adopted for development, with regional productivity replacement. Secondly, program design was optimized. Reservoirs were produced to the uttermost by combining geology with engineering and optimizing the orientation of horizontal wells, location of horizontal sections and reservoir stimulation modes. Thirdly, factory-like operation of horizontal wells was realized. In Block Su 53, 13 wells (including 10 horizontal wells) were selected for factory-like operation of horizontal wells. A factory-like operation mode based on “optimized program design, template engineering technology, streamline of operation, standardized operation procedure, comprehensive resource utilization and integrated team management” was proposed. Fourthly, significant breakthrough was made in horizontal well sidetracking technology. In 2015, two horizontal wells were sidetracked with average sandstone drilling ratio over 90%, average well-controlled reserves of 0.96×10⁸m³ and initial daily production rate of approximately 6.0×10⁴m³, recording the overall breakthrough from geology and engineering. And fifthly, ground process was rationalized. According to the idea of “underground prior to ground”, the overall development of horizontal wells has been realized with simplified gathering and transportation process, convenient management and decreased investment.

Key words: horizontal well sidetracking, factory-like operation, Block Su 53, geology-engineering integration, tight gas reservoir

CLC Number:

TE313

Liu Naizhen, He Kai, Ye Chenglin. Application of geology-engineering integration in the development of tight gas reservoir in Sulige Gasfield[J]. China Petroleum Exploration, 2017, 22(1): 53-60.

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