沉积背景控制下的储层预测方法——以大牛地气田TGM地区的应用为例

Reservoir prediction methods under the control of sedimentary background:case study on the TGM area in Daniudi gasfield

(1.中国地质大学（武汉）资源学院，湖北武汉430074；2.中国石油化工股份有限公司石油勘探开发研究院南京石油物探研究所，江苏南京210014；3.中国石油化工股份有限公司华北分公司勘探开发研究院，河南郑州450000)

China University of Geosciences,Wuhan 430074,China

TGM地区是大牛地气田天然气产能建设的重要区块，但该区天然气储层层系多、厚度薄，横向非均质性强，加之地震资料分辨率低，导致精确储层预测困难。为减小TGM地区储层预测的多解性，最大限度地提高储层预测的精度，在深入分析TGM地区储层发育地质特征的基础上，提出了沉积背景控制下的储层预测思路：将TGM地区储层预测作为一个系统工程，首先从储层的沉积背景出发圈定储层发育有利区块；然后针对有利区的地质情况和地震资料特征，选取针对性的储层预测方法和技术，对储层进行精细刻画。针对TGM地区太原组、山西组和下石盒子组储层预测的结果与钻井的符合率在90%以上。

TGM area is an important potential gas-production zone in Daniudi gasfield.However,its accurate reservoir prediction faces a series of problems,including multi-sequence reservoir,thin reservoir,heterogeneous reservoir and low-resolution seismic data.In order to fully improve the precision of reservoir prediction,the reservoir prediction method with the constraint of sediment background was proposed.Taking the reservoir prediction in TGM area as a systematic project,firstly,the potential reservoir zones are delineated with the constraint of sediment background;secondly,aiming at the geologic conditions and seismic data characteristics of the favorable area,effective reservoir prediction methods are selected to depict the reservoirs.The prediction results of Taiyuan,Shanxi and lower Shihezi formation in TGM area has more than 90% coincidence rate with drilling formation.