油气藏评价与开发 >
2020 , Vol. 10 >Issue 1: 64 - 70
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.01.010
彭水区块常压页岩气高效排采技术研究
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
Received date: 2019-07-22
Online published: 2020-02-04
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
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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