GW-CP194-80M型煤层气双保压取心工具研制及现场试验

doi:10.3969/j.issn.1006-6535.2020.05.021

特种油气藏 ›› 2020, Vol. 27 ›› Issue (5): 139-144.DOI: 10.3969/j.issn.1006-6535.2020.05.021

GW-CP194-80M型煤层气双保压取心工具研制及现场试验

朱庆忠¹, 苏雪峰¹, 杨立文², 苏洋², 罗军²

1.中国石油华北油田分公司,河北任丘 062552;
2.中国石油长城钻探工程有限公司,辽宁盘锦 124010

收稿日期:2019-08-26 修回日期:2020-04-20 出版日期:2020-10-25 发布日期:2022-02-18
通讯作者: 苏洋(1985—),男,工程师,2009年毕业于中国石油大学(北京)石油工程专业,现从事钻井取心研究和相关技术服务工作。
作者简介:朱庆忠(1966—),男,教授级高级工程师,1989年毕业于江汉石油学院勘查地球物理专业,2005年毕业于中国石油大学(北京)地质资源与地质工程专业,获博士学位,现从事油气田开发、地下储气库及煤层气开发方面的研究和生产管理工作。
基金资助:
国家科技重大专项“大型油气田及煤层气开发——沁水盆地高煤阶煤层气高效开发示范工程”(2017ZX05064);中国石油重大科技专项“煤层气勘探开发关键技术研究与应用——高煤阶煤层气开发增产技术研究”(2017E-1404)、“煤层气开采先导试验基地试验新方法研究”(2018D-5006-37)

Development and Field Test of GW-CP194-80M CBM Dual Pressure Coring Tool

Zhu Qingzhong¹, Su Xuefeng¹, Yang Liwen², Su Yang², Luo Jun²

1. PetroChina Huabei Oilfield Company,Renqiu, Hebei 062552, China;
2. CNPC Greatwall Drilling Company,Panjin, Liaoning 124010, China

Received:2019-08-26 Revised:2020-04-20 Online:2020-10-25 Published:2022-02-18

摘要/Abstract

摘要： 在煤层气取心过程中,煤心经过压力释放和取样操作,含气量与渗透率发生重大变化,测量数据失真,严重影响煤层气开发方案的制订。为获取覆压下原始状态煤心,减少因地层环境改变引起的煤心测试误差,研制了GW-CP194-80M型煤层气双保压取心工具。工具采用气液压力补偿技术和复合式胶筒保压内筒,可使岩心保持原始地层压力和适当围压,防止微裂缝的形成,还可实现地面带压拆卸,直接进行渗透率测试及临界解吸压力特征观测等后续测试实验。通过室内实验和现场试验表明,GW-CP194-80M型煤层气双保压取心工具性能可靠,技术可行,能有效保护岩心结构,达到双保压设计要求。该工具的成功研制,将为煤层气合理制订开发方案及精确计算含气储量提供重要的技术支持。

关键词: 取心工具, 煤层气, 地层压力, 围压, 双保压取心

Abstract: During the CBM coring process, there is a great variation for the gas content and permeability due to pressure release and sampling operation, which will distort the corresponding test data and seriously influence the formulation of CBM development program. the GW-CP194-80M CBM dual-pressure coring tool was developed to obtain the original core sample under overburden pressure and reduce the test error caused from the formation condition variation. Gas-liquid pressure compensation and a compound rubber pressure-holding cylinder were used to hold the original formation pressure and proper confining pressure to prevent the creation of micro fractures. The sample can be directly used to permeability, critical desorption pressure and other subsequent tests through disassembly under pressure eon the ground. Laboratory field tests indicates that the GW-CP194-80M CBM dual-pressure coring tool is characterized by reliable performance, technical feasibility, effective maintenance of sample structure and favorable dual-pressure performance. This coring tool could provide certain technical reference for the reasonable formulation of CBM development program and accurately determine reserves.

Key words: coring tool, CBM, formation pressure, confining pressure, dual-pressure coring

中图分类号:

TE921

朱庆忠, 苏雪峰, 杨立文, 苏洋, 罗军. GW-CP194-80M型煤层气双保压取心工具研制及现场试验[J]. 特种油气藏, 2020, 27(5): 139-144.

Zhu Qingzhong, Su Xuefeng, Yang Liwen, Su Yang, Luo Jun. Development and Field Test of GW-CP194-80M CBM Dual Pressure Coring Tool[J]. Special Oil & Gas Reservoirs, 2020, 27(5): 139-144.

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GW-CP194-80M型煤层气双保压取心工具研制及现场试验

Development and Field Test of GW-CP194-80M CBM Dual Pressure Coring Tool

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