Adaptive Channel沉积相建模在水平井地质导向中的应用  

Application of Adaptive Channel Sedimentary Facies Modeling in Horizontal-Well Geo-Steering

作　　者：王文胜[1,2] 张吉[1,2] 马志欣[1,2] 孙卫锋[1,2] 白玉奇[1,2] 

机构地区：[1]中国石油长庆油田分公司,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《特种油气藏》2017年第6期111-115,共5页Special Oil & Gas Reservoirs

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藏开发示范工程"(2016ZX05050);"长庆气田稳产及提高采收率技术研究"(2016E-0509)联合资助

摘　　要：针对出发井和末端井的二维剖面地质导向技术不能充分体现邻井间立体地质关系,储层预测效果差的问题,利用现代辫状河沉积、野外露头、加密区构型解剖及水平井分析等资料,建立了研究区辫状河储层单层沉积微相参数地质知识库。以此为约束,采用基于目标对象的Adaptive Channel沉积相建模方法,构建多期河道叠置的三维沉积微相模型,建立了不同概率的预测模型,指导水平井地质导向。结果表明,该方法指导水平井地质导向的成功率达到90.9%,与传统方法相比,砂体钻遇率提高约8个百分点,气层钻遇率提高约5个百分点,试气产量及生产能力均明显提升。该方法对强非均质性致密砂岩气藏高效开发提供了技术支持。The 3D geological relation between adjacent wells cannot be fully characterized by the 2D-secton geo- steering technology, which usually leads to poor reservoir prediction. A geology database for the monolayer sedimen- tary microfacies of braided river reservoir is established according to the modern braided river sedimentation, out- crop, structure analysis of infilling region and horizontal well data. As a constraint, a target-based Adaptive Chan- nel sedimentary facies modeling method is used to establish a 3D sedimentary microfacies model with multi-stage stacking channels and prediction models with different probabilities to guide the horizontal-well geo-steering. The corresponding horizontal-well geo-steering success rate has reached 90.9%. Comparing with that of traditional methods, the sandbody drilling rate is increased by about 8percentage points and the gas reservoir drilling rate is in- creased by about 5%, which results in significant test gas production and productivity. This research could provide certain technical reference for the efficient development of tight sandstone gas reservoirs with strong reservoir hetero- geneity.

关 键 词：水平井地质导向 沉积相建模 地质知识库 致密砂岩气藏 苏里格气田 

分 类 号：TE325[石油与天然气工程—油气田开发工程]