涩北气田多层合采井分压测试技术  

Separate pressure testing technique for commingling production wells in Sebei gas field

作　　者：周治岳 刘俊丰 温中林 杨伟 李拉毛才旦 陈智芳 ZHOU Zhiyue;LIU Junfeng;WEN Zhonglin;YANG Wei;LI Lamaocaidan;CHEN Zhifang(No.1 Gas Production Plant of PetroChina Qinghai Oilfield Company,Ge′ermu,Qinghai 816099,China)

机构地区：[1]中国石油青海油田分公司采气一厂,青海格尔木816099

出　　处：《油气井测试》2019年第2期20-26,共7页Well Testing

摘　　要：涩北气田气藏层多、层薄,气水层间互,各层压力差异较大,层间干扰复杂,多层合采压力测试无法获得各小层的压力资料,严重影响气田各种增产措施效果。结合气藏地质特征,选取多层合采井,将JCY-Ⅱ型分采与测试一体化智控系统连接到生产管柱一同下井,地面实时控制井下工具,进行井下测试数据的录取,快速解释获取各小层的渗透率、表皮系数等储层物性参数。该气田S3-2井历经5个测试阶段,分别对313、314小层实施井下开井生产、关井恢复压力,成功求取了单层、合层流动压力、静压、压力恢复等资料。分层测压技术在涩北气田推广应用13井次,施工成功率100%,资料录取成功率100%,解决了涩北气田气井单层测试难题,可为后续开发方案的调整提供技术依据。The gas reservoirs in Sebei gas field have the characteristics of thin layer development,gas-water interlayer interaction,great pressure difference among different layers and complex interlayer interference,which results in that the pressure data of each small layer cannot be obtained by pressure test of commingling production,thus seriously influencing the effect of various stimulation measures in the gas field.In view of the geological characteristics of the gas reservoir,the wells using the commingling production technology were selected as the research object,and the new JCY-II type separate production and testing integrated intelligent control system was connected to the production pipe string in these wells.This technology can control the downhole tools in real time on the ground and carry out the acquisition of downhole test data.At the same time,the reservoir physical parameters such as permeability and skin factor of each small layer can be interpreted quickly.Five test stages were conducted in the application of Well S3-2.During the test,the layers of No.313 and No.314 were separately opened for production and shut in for pressure build-up.The flow pressure,static pressure,build-up pressure and other information of single layer and multi-layers were successfully obtained.The separate layer pressure testing has been applicated in 13 wells in the Sebei gas field after promoting,the construction success rate was 100%,and the data acquisition success rate was 100%.This method effectively solves the problem of single-layer testing of gas wells in the Sebei gas field and can provide technical basis for the adjustment of subsequent development plans.

关 键 词：涩北气田 层间干扰 多层合采 分层测压 试井解释 动态监测 

分 类 号：TE353[石油与天然气工程—油气田开发工程]