苏里格气田国际合作区河流相储层井位部署关键技术

发布时间：2018-06-29 11:28

本文选题：苏里格气田国际合作区 + 二叠纪　；参考：《天然气工业》2017年09期

【摘要】：苏里格气田国际合作区位于该气田中南部,其开发层系属于二叠系复杂河流相岩性气藏,掌握河流相储层的类型、分布、规模和集中程度,是合理高效部署开发井位的前提和基础。通过实践探索与技术攻关,在该区形成了以三维地震泊松比岩性识别、棋盘式井网主河道带预测、河道微相精细解剖、动—静结合高产井筛选及东—西向水平井钻探为核心的井位部署关键技术。应用效果表明:(1)泊松比地震反演可有效识别厚砂岩(砂岩泊松比介于0.19~0.25,泥岩泊松比介于0.27~0.30),把握大河道带的分布;(2)通过提取棋盘式井网净砂岩(自然伽马小于60 API,有效孔隙度大于6%,含气饱和度大于60%)厚度能快速识别河流中心部位;(3)明确该区发育2类叠置河道带、5种主要沉积相和10种河道微相;(4)单井动—静态数据分析表明,具有低自然伽马值(小于40 API)、高有效孔隙度(超过10%)及较高深电阻率响应(大于90Ω·m)是上古生界二叠系下石盒子组盒8段高产井(单井最高可采储量超过1×108 m~3)的典型配置;(5)在辫状主河道带中心区域部署东—西向水平井有利于横向沟通多期河道。结论认为,该套井位部署关键技术加深了对该区河流相储层地质规律的认识,有效支撑了该合作区的开发建设。
[Abstract]:The international cooperation area of Sulige gas field is located in the central and southern part of the gas field. Its development system belongs to the Permian complex fluvial facies lithologic gas reservoir. The types, distribution, scale and concentration of fluvial facies reservoir are grasped. It is the premise and foundation of rational and efficient deployment of development well location. Through practical exploration and technical research, the lithologic identification of three-dimensional seismic Poisson's ratio, prediction of main channel belt of chessboard well pattern and fine dissection of channel microfacies have been formed in this area. The key technology of well location deployment with dynamic-static combination of high-yield well selection and east-west horizontal well drilling. The application results show that: (1) Poisson's ratio seismic inversion can effectively identify thick sandstone (sandstone Poisson's ratio is 0.19 ~ 0.25, mudstone Poisson's ratio is between 0.27 ~ 0.30), and grasp the distribution of Dahe River belt; (2) by extracting chessboard pattern net sandstone (natural gamma is less than 60 API), The effective porosity is greater than 6 and the gas saturation is more than 60%) the thickness can quickly identify the central part of the river; (3) it is clear that there are 5 main sedimentary facies and 10 kinds of channel microfacies in 2 types of superimposed channel zone in this area; (4) the dynamic and static data analysis of single well shows that, Low natural gamma value (< 40 API), high effective porosity (more than 10%) and high resistivity response (> 90 惟 m) are the high yield wells in Bo8 member of Shihezi formation in Upper Paleozoic Permian. The maximum recoverable reserves of single well exceed 1 脳 108 mm3. (5) in the central area of the braided main channel zone, the EW horizontal well is favorable for horizontal communication of multi-stage channel. It is concluded that the key techniques of well location deployment have deepened the understanding of the geological laws of fluvial reservoirs in this area and effectively supported the development and construction of the cooperation area.
【作者单位】：中国石油长庆油田公司苏里格气田研究中心;低渗透油气田勘探开发国家工程实验室;中国石油长庆油田公司气田开发处;
【基金】：国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气开发示范工程”(编号:2016ZX05050);国家科技重大专项“致密气储层精细描述与地质建模技术应用”(编号:2016ZX05047003-006)
【分类号】：TE37

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