基于小层约束对比下的储层反演综合研究  

Comprehensive Research of Thin-layer Compared and Constrained Reservoir Inversion

作　　者：蔡伟祥[1,2] 夏振宇 易院平[1,2] 马楠[1,2] 黄凤祥[1,2] 桂志先[1,2] 汪勇[1,2] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室 [2]长江大学地球物理与石油资源学院,武汉430100 [3]江西省天然气有限公司,南昌330096

出　　处：《科学技术与工程》2016年第23期98-103,共6页Science Technology and Engineering

基　　金：国家"973"项目(2013cb228605);国家科技重大专项(2011ZX05006-004)联合资助

摘　　要：五3东(WSD)区发育砂砾岩储层,一般由多期扇体叠置而成,物性变化大,横向变化快,非均质性强,这对该区有利储层的评价造成了一定困难。针对研究区勘探开发的重难点,确定了基于小层约束下的约束稀疏脉冲反演方法重点对该区上乌尔禾组P3w1段油组进行小层对比下的储层预测综合研究。首先基于高分辨率层序地层学理论对该区地层进行精细划分和对比;其次对地震数据、井数据进行质控,分析储层敏感性参数,确定储层反演的可行性;然后进行精细层位标定、子波提取,根据划分的小层和已处理好时深关系的测井曲线建立小层约束下的低频模型;最后反复调试关键反演参数,实现全区反演研究。根据所得反演结果,从平面和剖面两个角度对比分析各小层段储层的分布规律,同时建立符合该区地质规律的成藏模式,预测有利储层发育区带,为该区下一步开发调整提供了方向。WSD area develops sand-conglomerate reservoir, generally superimposed of muhiphase fans, with the characteristics of fast lateral variation, great changes in physical properties and serious heterogeneity. Therefore, it brings difficulties for the favorable reservoir evaluation in the area. In view of the difficult points of exploration and development in the study area, the constrained sparse pulse inversion between thin-layer compared and constrained was used to comprehensive resemvh on reservoir prediction under the contrast of small layers for P3w~ member oil group. Fist of all, The thin-layers were finely divided and contrasted under the guidance of the theory- of the high- resolution sequence stratigraphy, secondly, the feasibility of reservoir prediction was confirmed on the basis of the quality control for well seismic datas and sensitivity analysis of reservoir parameters, then, through the fine horizon calibration and wavelet extraction, the low frequency model which under tile rest6ction of small layers was generated on the basis of small layers and processed well logging curves, finally, debugged key inversion parameters repeatedly to realize inversion research in the whole region. According to the inversion result, contrastively analyzed the reservoir distribution of each small layer from plane and profile, meanwhile, the accumulation model was established which conforms with geological regularity in the area, the favorable reservoir development zones were predicted to provide direction for the next step of development and adjustment.

关 键 词：五3东区 砂砾岩储层 约束稀疏脉冲反演 储层预测 低频模型 成藏模式 

分 类 号：P315.73[天文地球—地震学]