地质统计学反演在超深超薄储层预测中的应用  

Application of geostatistical inversion in prediction of deeply buried and ultrathin sandstone reservoirs

作　　者：徐博[1] 刘永雷[2] 曾鸿 杨洋[2] 郑晓丽 张建伟 XU Bo;LIU Yonglei;ZENG Hong;YANG Yang;ZHENG Xiaoli;ZHANG Jianwei(Xi'anShiyouuniversity,Xi'an 710065,China;BGP、CNPC,Zhuozhou 072751,China)

机构地区：[1]西安石油大学,西安710065 [2]中国石油集团东方地球物理勘探有限责任公司,涿州072751

出　　处：《物探化探计算技术》2019年第6期718-723,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(2016ZX05053)

摘　　要：岩性油气藏是目前中国陆上油气勘探的四大重要领域之一,也是中国陆上实现油气增储上产的重要现实领域。但受其复杂性影响,这类目标的勘探对物探技术的发展提出了更大的挑战,特别是储层预测的精度,其准确与否直接决定了勘探的成败。这里通过精细层序格架下的地层解释,精细地震相分析,区域地质认识等基础上,利用地质统计学反演对塔里木盆地塔北西部玉东地区古近系岩性圈闭的储层分布进行了研究。成功实现了对埋深超过5 000 m,单砂体厚度小于4 m超薄储层的准确预测,垂向分辨率相比于稀疏脉冲反演提高了5倍以上,预测厚度实钻吻合率达到92.1%。根据预测结果部署的4口评价井均获得高产油气流,成功实现了油藏的滚动扩边、新增油藏面积、新增储量。本次研究建立了完善的面向超薄砂岩储层的地质统计学反演流程,可为相同区域的研究提供借鉴。Lithologic reservoir is one of the four important fields of onshore oil and gas exploration in China, and it is also an important realistic field to increase oil and gas reserves and production in China. However, due to its complexity, the exploration of such targets poses a greater challenge to the development of geophysical technology, especially the accuracy of reservoir prediction, which often directly determines the success of the exploration. In this paper, integrate with precise seismic interpretation constrained by sequence framework, seismic and sedimentary facies analysis, and regional geological knowledge, the distribution of the ultra-thin reservoirs with buried depth of more than 5 000 m and thickness of single sand body less than 4 m has been predicted successful in Yudong area, western Tarim Basin. Vertical resolution has been improved by more than 5 times compared with sparse spike seismic inversion, and the whole thickness identical rate between inversion results with actual drilling is more than 92%. According to the prediction results, all the four evaluation wells deployed have achieved high oil and gas production, new reservoir area increased about and new reserves increased about. This study has established a perfect geostatistical inversion process for ultra-thin sandstone reservoirs, which can provide a good reference for the study of the same area also.

关 键 词：储层预测 反演 地质统计学 

分 类 号：P631.4[天文地球—地质矿产勘探]