泌阳凹陷深层致密砂岩孔隙结构测井评价方法研究  

Logging Evaluation Method for the Tight Sandstone Pore Structure in Biyang Depression

作　　者：章新文[1] 毛海艳 谢春安 谭静娟[1] 赖富强 Zhang Xinwen;Mao Haiyan;Xie Chun′an;Tan Jingjuan;Lai Fuqiang(Sinopec Henan Oilfield Company,Nanyang,Henan 450000,China;Chongqing Key Laboratory of Complex Oil and Gas Exploration and Development,Chongqing 401331,China;Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]中国石化河南油田分公司,河南南阳450000 [2]复杂油气田勘探开发重庆市重点实验室,重庆401331 [3]重庆科技学院,重庆401331

出　　处：《特种油气藏》2019年第4期27-32,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“泌阳凹陷陆相页岩油资源评价与目标优选”(2017ZX05049-005-005);国家青年科学基金项目“基于成像测井的泥页岩储层可压裂性评价方法研究”(41402118);重庆市基础研究与前沿探索项目“页岩储层多组分多尺度数字岩心构建及脆性微观成因机理模拟研究”(cstc2018jcyjAX0503);重庆市教委科学技术研究项目“基于深度学习的碳酸盐岩储层缝洞自动识别及评价研究”(KJQN201801502)

摘　　要：泌阳凹陷安棚深层致密砂岩孔隙结构较为复杂,孔隙结构参数计算准确与否关系到储层评价是否正确有效。首先从Archie公式出发,提出井筒泥浆侵入近似等效为实验室高压压汞的设想,联合常规与核磁共振测井资料,通过公式推导研究了T 2谱转换为伪毛管压力曲线的新模型,然后利用岩心高压压汞实验数据对该模型进行标定,计算出储层孔径分布曲线、最大孔喉半径等孔隙结构参数。研究结果表明:新模型计算的孔隙结构参数与岩心实验分析结果相关系数均高于0.75,相对误差小于15%,具有较好的一致性。通过研究区新井资料跟踪处理和试气验证,该方法可有效识别出常规油层和差油层,证明了该方法准确性高。该方法为复杂储层的有效识别和评价提供了借鉴,具有较好的应用前景。The deep tight sandstone in the Anpeng Formation of Biyang Depression is characterized by complex pore structure,and the reservoir evaluation is greatly dependent on the calculation of reservoir pore structure parameters.Based on the Archie formula,it is proposed that the wellbore mud intrusion is treated as the laboratory high-pressure mercury penetration test.According to the conventional and nuclear magnetic resonance logging data,a new model was provided to convert the T 2 spectrum into a pseudo-capillary pressure curve.Then the model was calibrated by the laboratory high-pressure mercury penetration test data.A series of pore structure parameters were calculated by this new model,including pore diameter distribution,maximum pore-throat radius,etc.Research indicates that the correlation coefficient between the calculated pore structure parameters by the new model and the laboratory core test data exceeds 0.75 and the corresponding relative error is less than 15%,which shows a favorable consistency.According to the new well data and gas testing data,conventional oil reservoir and poor oil reservoir can be effectively identified by this new method,which shows a high accuracy.This research could provide certain reference for the effective identification and evaluation of complex reservoirs,which shows a favorable application prospect.

关 键 词：深层致密砂岩 孔隙结构 核磁共振 测井 泌阳凹陷 

分 类 号：TE122.3[石油与天然气工程—油气勘探]