工程工艺

彭水区块常压页岩气高效排采技术研究

  • 段承琏 ,
  • 魏风玲 ,
  • 魏瑞玲 ,
  • 刘芳 ,
  • 刘静 ,
  • 吴小丁
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  • 中国石化中原油田石油工程技术研究院,河南 濮阳 457000
段承琏(1987 —),女,本科,工程师,主要从事采气工艺的相关研究及推广工作。通讯地址:河南省濮阳市中原东路石油工程技术研究院,邮政编码:457000。E-mail:duanclw@Foxmail.com

收稿日期: 2019-07-22

  网络出版日期: 2020-02-04

基金资助

“十三五”国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061)

High-efficient drainage technology of shale gas reservoirs with normal pressure in Pengshui Block

  • Chenglian DUAN ,
  • Fengling WEI ,
  • Ruiling WEI ,
  • Fang LIU ,
  • Jing LIU ,
  • Xiaoding WU
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  • Zhongyuan Oilfield Petroleum Engineering Technology Research Institute, SINOPEC, Puyang, Henan 457000, China

Received date: 2019-07-22

  Online published: 2020-02-04

摘要

彭水区块属于常压页岩气藏,压裂投产后无法自喷。在正常生产中也有地层水产出,由于地层能量不足、产气量低无法携液生产,因此,排采需求贯穿整个生产阶段。由于排液量变化大,不同开采阶段缺乏对应的合理排采方式,彭水页岩气的排液效率较低。为了确定适合彭水区块的高效排采方式,针对区块的排液特点,从经济和技术角度综合评价、优选了电潜泵+气举复合排采、同心管(小直径管)排采、自产气压缩机气举排采、外输气气举排采方式,形成了一套适合彭水区块常压页岩气的排采技术,气举排液的返排率达到72 %,对提高彭水页岩气的开发效益具有一定的指导意义。

本文引用格式

段承琏 , 魏风玲 , 魏瑞玲 , 刘芳 , 刘静 , 吴小丁 . 彭水区块常压页岩气高效排采技术研究[J]. 油气藏评价与开发, 2020 , 10(1) : 64 -70 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.01.010

Abstract

The shale gas reservoirs in Pengshui Block belong to the normal pressure system, where the spontaneous production fails after hydraulic fracturing. This is due to the relative low energy and productivity of the reservoirs, hence it is necessary to deploy the artificial lift for the production wells to drainage the water throughout the whole production stage. As the drainage methods are hardly suitable for the various flowback volume in different mining stages, the water drainage efficiency is low. In order to determine the efficient drainage strategies for Pengshui Block, several drainage processes, including electric potential pump+gas lift, concentric tube(small diameter tube) drainage, self-sufficient gas lift and transmission gas lift, are comprehensively evaluated and optimized at the point of economic and technical stage according to the drainage characteristics of the block. The drainage efficiency of gas lift forms a set of drainage technology suitable for shale gas with normal pressure in Pengshui Block. The flowback efficiency of gas lift is up to 72 % in field application. It provides a significant guideline for improving the development of shale gas reservoir in Pengshui.

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