塔河地区古近系低阻碎屑岩储层岩石物理特征及经济性评价研究
|
金芫
|
烟台职业学院，山东烟台，264670
|
摘要：本研究针对塔河地区古近系弱固结、岩性复杂、非均质性强的低电阻率储层，针对其低阻成因不清、测井系列不全导致评价准确性受限等核心问题，开展了系统的岩石物理实验、测井数值模拟与经济性评价。基于岩心CT 扫描、XRD、核磁共振等实验，揭示了黏土附加导电和高束缚水饱和度是导致储层低阻的主要地质成因。通过构建基于BO-Catboost 优化集成学习的岩性识别模型，有效提升了复杂岩性的判识精度。结合阵列感应测井二维/三维正演模拟，开发了“井眼-侵入”一体化校正方法，实现了地层真电阻率的准确求取。进一步优化了三孔段饱和度模型，建立了融合电阻率、核磁、声波等多参数的流体识别图版。经济性评价表明，在当前技术成本和市场条件下，该储层直接进行大规模商业开发的经济性较差，静态投资回收期长，净现值为负，但其经济性对天然气价格和单井产量高度敏感。未来需通过地质-工程一体化技术攻关，实现“降本增效”，方能把握开发机遇。研究成果为塔河地区低阻复杂储层的测井精细解释与开发决策提供了关键技术支撑。
关健词：低电阻率储层；岩石物理；阵列感应测井；经济评价；塔河地区
|
Rock Physical Characteristics and Economic Evaluation of Low-Resistivity Clastic Reservoirs in the Paleogene of Tahe Area
|
Yan Jin
Yantai Vocational College，Yantai Shandong 264670，China
|
Abstract：This study focuses on the Paleogene low-resistivity reservoirs in the Tahe area, characterized by weak consolidation, complex lithology, and strong heterogeneity. To address the core issues of unclear mechanisms causing low resistivity and limited evaluation accuracy due to incomplete well logging suites, systematic rock physics experiments, well logging numerical simulations, and economic evaluations were conducted. Based on core CT scanning, XRD, nuclear magnetic resonance (NMR) and other experiments, it was revealed that clay additional conductivity and high irreducible water saturation are the primary geological causes of the low resistivity in the reservoirs. A lithology identification model based on BO-Catboost optimized ensemble learning was developed, effectively improving the accuracy of identifying complex lithologies. By incorporating 2D/3D forward modeling of array induction logging, an integrated "borehole-invasion" correction method was developed to accurately determine the true formation resistivity. Furthermore, a three-porosity-component saturation model was optimized, and a fluid identification crossplot integrating multiple parameters such as resistivity, NMR, and acoustic data was established. Economic evaluation indicates that under current technical costs and market conditions, large-scale commercial development of these reservoirs is economically unfavorable, characterized by a long static payback period and a negative net present value. However, the economics are highly sensitive to natural gas prices and single-well production rates. Future development opportunities rely on geological-engineering integrated technological breakthroughs to achieve "cost reduction and efficiency enhancement." The research findings provide key technical support for fine well log interpretation and development decision-making of low-resistivity complex reservoirs in the Tahe area.
Keywords : Low-resistivity reservoirs；Rock physics；Array induction logging；Economic evaluation；Tahe area
参考文献
[1] 张金川，聂海宽，徐波，等．中国页岩气资源勘探潜力[J]．天然气工业，2008，28(6)：136-140．
[2] 贾承造，邹才能，李建忠．中国致密气评价标准、主要类型、基本特征及资源潜力[J]．石油学报，2012，33(3)：343-355．
[3] 金力钻,孙玉红,周文革,等.低电阻率砂岩油气层的测井饱和度计算新模型[J].测井技术,2020,44(1):55-60.
[4] 刘思慧.凝灰质储层测井评价方法研究[D].吉林大学,2016.
[5] 张丽华,潘保芝,单刚义.腰英台油田低孔低渗储层测井评价方法研究[C]//国务院学位委员会;教育部.国务院学位委员会;教育部, 2008.
[6] G.E.Archie ,张庚骥.电阻率测井在确定某些储层特性中的作用[J].测井技术,2007,(3):197-202.
[7] 邹才能，董大忠，王玉满．中国页岩气形成机理、地质特征及资源潜力[J]．石油勘探与开发，2010，37(6)：641-653．
[8] 章轩玮.塔里木盆地塔中上奥陶统良里塔格组层序岩相古地理研究[D].中国地质大学(北京),2016.
[9] 张涛,李相方,王香增,等.论直井-水平井混合井型开发陆相/海陆过渡相页岩气的优势[J].石油科学通报,2021,6(2):10.
|
|
|
论文收录证明 / 文献检索报告
Document Retrieval Certificate / Proof of Publication Indexing
作者贡献声明 / 贡献确认书
Author Contribution Statement / Certificate of Authorship Contribution
同行评审报告 / 评审意见
Peer Review Report / Peer Review Comments
利益冲突
Conflict of Interest
作者声明不存在任何利益冲突。
The author declares no conflict of interest.
|
|
