地质工程一体化在苏里格致密气藏开发中的应用

doi:10.3969/j.issn.1672-7703.2017.01.008

摘要/Abstract

摘要： 受低孔、低渗、低丰度等基本地质特征的影响，苏里格气田面临单井产量低、压力下降快等开发难题。为提高单井产量和气藏采收率，实现区块优质、高效开发，以地质工程一体化理念为指导，在苏10、苏11、苏53区块开展一系列技术研究和现场试验。工程地质一体化主要体现在以下几个方面：①确定区块开发方式。苏10区块以直井、丛式井开发为主，井间产能接替；苏11、苏53区块分别以丛式井和水平井开发为主，区域产能接替。②优化方案设计。通过地质工程结合，优化水平井方位、水平段位置、储层改造方式等参数，实现储层最大动用。③实现水平井工厂化作业。在苏53区块优选13口井（10口水平井）开展水平井工厂化作业，探索出了一套以“方案设计最优化、工程技术模板化、施工作业流程化、作业规程标准化、资源利用综合化、队伍管理一体化”为核心的工厂化作业模式。④侧钻水平井技术取得重大突破。2015年实施的2口侧钻水平井，平均砂岩钻遇率均超过90%，平均单井控制储量0.96×10⁸m³，初期日产量接近6.0×10⁴m³，实现了地质到工程的整体突破。⑤地面流程合理化。按着地面服从地下的思路，水平井整体开发达到了简化集输流程、便于管理、节省投资的效果。

关键词: 侧钻水平井, 工厂化作业, 苏53 区块, 地质工程一体化, 致密气藏

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

中图分类号:

TE313

刘乃震, 何凯, 叶成林. 地质工程一体化在苏里格致密气藏开发中的应用[J]. 中国石油勘探, 2017, 22(1): 53-60.

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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