第40卷第3期
天然气勘探与开发
四川盆地东部高陡构造带岩性封隔
不对称气水分布模式
刘勇1,2
杨洪志12马智超12张春12王容12 阮明龙12别沁3刘永良4
1.中国石油西南油气田公司勘探开发研究院2.国家能源高含硫气藏开采研发中心 3.中国石油西南油气田公司输气处工艺研究所4.中国石油西南油气田公司川东北气矿
地质勘探
摘要在多期构造运动的影响下，四川盘地东部地区形成了成排成带高陡构造，区带构造幅度高，气水分异衡底，气裁气水赋存模式多为构造控制的边水赋存模式。川东地区石炭系气藏开发实践中，发现沿剩蚀线周缘及断层活动区，受后期成戴的影响，在高陡构造气藏中存在着不对称气水分布区，同一气藏内部具有多个不同的气水界面，且各区水体表现出的产水特征也不间。综合利用动静态资料分析确定该气水分布区的分布特征，提出了川东高陡构造带岩性封隔不对称气水分市模式的概念。研究结果表明： ①该模式的形成要同时具有（构造）岩性封堵条件和充足的供烃、排水能力，且后期烃类充注能力较强；②在不对称的气水分布区，水体的分布范图、水侵能量大小均有差异，不同气水分布区水体活联程度不同一—相对局限区水体能量受限，对气井影响理度低：而相对开阔区城则水体能量较大，对气并影响程度高。该研究成果为该区气蔗开发技术对策调整和提高采收率提供了理论依据，对有水气截描述及评价具有重要的借签意义。
关键词四川盐地川东高陡构造带石炭纪岩性封隔地质单元不对称气水分市水体能量
排水效果
DOI: 10.12055/gaskk.issn.1673-3177.2017.03.001
The lithologically sealed gas-water asymmetric distribution model of high-steep
structuralbeltinEastSichuanBasin
Liu Yong", Yang Hongzhi'-, Ma Zhichao'2, Zhang Chun'2, Wang Rong"2,
Ruan Minglong",Bie Qin',LiuYongliang
(I.Exploration andDevelopment Research Institute,PetroChinaSouthwestOil & GasField Company,Chengdu,Si-chuan 610041,China; 2. National Energy R&D Center of High Sulfur Gas Exploitation, Chengdhu, Sichuan 610051 China; 3.Technology Research Instituteof GasTransportationDepartment,PetroChina SouthwesiOil&Gas Field Company,Chengdu, Sichuan 610215,China;4.Northeast SichuanDivision,PetroChinaSouthwesi Oil&GasField Company,Dazhou,Sichuan635000,China)
Abstract: As a result of multi-stage tectonic movements, many rows of high-steep structural belts are developed in East Sichuan Ba-sin. These structural belts are characterized by high structural amplitude and thorough gas-water differentiation, The water in gas res-ervoirs mainly exists in the form of structure-controlled edge water. It is demonstrated in the development practice of Carboniferous gas reservoirs in East Sichuan Basin that, along denudation line and in active fault areas, an asymmetric gas-water distribution zone is found in high-steep structural gas reservoirs due to the effect of later hydrocarbon accumulation process. There are a number of different gas-water contacts in the same gas reservoir, and water production characteristics of aquifers in different areas are different. In this paper, the characteristics of this gas-water distribution model were analyzed and confirmed by using dynamic and static data eoeaeeeaseaoaeaa steep structural beit in East Sichuan Basin. According to the study results, this model was formed under two conditions, i.e., (tectonic) lithologic sealing, and sufficient hydrocarbon supply and water drainage capacity, as well as stronger hydrocarbon charging capacity in the later stage. In gas-water asymmetric distribution areas, the water distribution range and water invasion energy are different. The activity of water is different depending on gas-water distribution areas. In restricted areas, the water energy is limited, having less effect on gas wells. In open areas, the water energy is high, having more effect on gas wells. The study results provide the theoretical basis for deveiopment strategy adjustment and recovery enhancement of gas reservoirs, and further understanding on gas-water distri-bution models of high-steep structural belts, contributing greatly to the description and evaluation of gas reservoirs with water.
Keywords: Sichuan Basin; High-steep structural belt in East Sichuan Basin; Carboniferous; Lithologic sealing; Geologic unit; Gas-water asymmetric distribution; Water energy; Water drainage effect
基金项目：国家科技重大专项“四川盆地大型碳酸盐岩气田开发示范工程”（编号：2016ZX05052)。
第一作者：刘勇，1981年生，2010年毕业于西南石油大学矿产普查与勘探专业，高级工程师，博士；主要从事油气田开发研究工作。
地址：（610041）四川省成都市高新区天府大道北段12号，电话：（028）86015531。E-mail:castledream@petrochina.com.cn 万方数据