致密砂岩储层地质导向技术研究及其应用——以苏里格气田XX区为例  

APPLICATION OF GEOSTEERING TECHNIQUE TO TIGHT SANDSTONE RESERVOIR: AN EXAMPLE FROM ONE REGION IN SULIGE GASFIELD

作　　者：崔越华[1,2] 张保国[1,2] 费世祥[1,2] 王金成[1,2] 刘雪玲[1,2] 安志伟[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《天然气勘探与开发》2015年第2期63-67,81,共6页Natural Gas Exploration and Development

基　　金：中国石油天然气股份公司科技重大专项(2011E-1306)"长庆油田油气当量上产5000万吨关键技术研究"资助

摘　　要：苏里格气田XX区上古生界含气层系为物性较差的低孔低渗致密砂岩储层,砂体空间结构复杂,非均质性强。围绕苏里格气田XX区致密砂岩储层进行砂体精细解剖,开展砂体空间结构特征研究,论证了水平井地质导向技术在该区的具体应用及其实施效果。针对垂向叠置的多套砂体内部单砂体与隔夹层发育特征,强化了水平井轨迹优化设计,明确了针对该区致密砂岩储层的水平井地质导向技术。实践表明,大斜度式与阶梯式水平井垂向上可钻遇两套或多套气层,有效提高了储量动用程度。In one region of Sulige gasfield, the upper Paleozoic gas-bearing bed is a tight sandstone reservoir with low porosity, low permeability, and poor petrophysical properties. This reservoir is also featured by complex space structure of sandbody, and strong heterogeneity. In this study, a fine anatomy is carried out for this sandbody; some characteristics of its space structure are explored; a horizontal-well geosteering technology has been applied to this region; and its application effect is demonstrated. Moreover, to use this technology is based on some characteristics of single sandbody from many sandbodies and its adjoining layers or interlayers. Results show that two or more suites of gas layers can be drilled at certain high-angle derivate and ladder horizontal wells in vertical, resulting in an increase of the producing degree of difficult recoverable reserves.

关 键 词：苏里格气田 致密砂岩储层 砂体精细解剖 水平井地质导向 

分 类 号：TE243[石油与天然气工程—油气井工程]