川西北部超深层栖霞组气藏试采特征分析  

Analysis of test production characteristics of ultra-deep Qixia formation gas reservoir in northwestern Sichuan

作　　者：罗静 朱遂珲 万亭宇 冉丽君 张楚越 吴丽 LUO Jing;ZHU Suihui;WAN Tingyu;RAN Lijun;ZHANG Chuyue;WU Li(Northwest Sichuan Gas field of Southwest Oil and Gas Field Company,PetroChina,Jiangyou,Sichuan 621741,China)

机构地区：[1]中国石油西南油气田公司川西北气矿,四川江油621741

出　　处：《石油地质与工程》2021年第5期38-43,共6页Petroleum Geology and Engineering

摘　　要：川西北部深层碳酸盐岩气藏资源丰富,具有一定的产能规模。通过对生产动态、连通关系、储层渗流特征、产能特征及动态储量等分析,找到气藏试采特征:气藏早期均能稳定生产,试采效果不同,储层自我净化,生产情况逐渐变好;气藏③、④条带具有连通的可能性,④条带北部为一个压力系统;储层属于中–低渗裂缝–孔隙型储层,存在非均质性,产能差异较大;初步计算试采井动态储量为170.15×10^(8)~257.43×10^(8) m^(3)。同时,在试采过程中也存在一些问题,如试采井比较集中,动用不均衡,④条带北部采气速度较快;产水风险井初期配产高,动态监测较滞后,水体认识难度大。下步重点对储量动用及水侵开展研究工作,为气藏开发方案编制提供支撑。Deep carbonate gas reservoirs in northwestern Sichuan are rich in resources and have a certain production capacity.Through the analysis of production performance,connectivity relation,reservoir seepage characteristics,productivity characteristics and dynamic reserves,the characteristics of test production in gas reservoir are figured out as the follows.The gas reservoir can be produced stably in the early stage,with different test production effects,the gas well can be self-purified,and the production situation is gradually getting better.Banded areas③and④in the gas reservoir have the possibility of connecting,and there is a pressure system in the north of the banded area④.The reservoir belongs to medium-low permeability fracture-pore reservoir,with heterogeneity and great productivity difference.The preliminary calculated reserves of test production wells are 170.15×10^(8)~257.43×10^(8) m^(3).Meantime,there are also some problems in the process of test production,such as the concentrated test production wells,unbalanced production,fast gas recovery speed in the north of the banded area④,higher initial production allocation for risk wells of water production,delayed dynamic monitoring and great difficulty in recognizing water bodies.The target in the next step is to focus on the research on reserve production and water invasion,and therefore,to provide guidance for the preparation of development plan of gas reservoirs.

关 键 词：川西北部 超深层 栖霞组 试采特征 产能特征 

分 类 号：TE353[石油与天然气工程—油气田开发工程]