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| 渤中25-1油田沙河街组低孔低渗储层特征及分类评价 | |
| 引用本文： | 杨玉卿,潘福熙,田洪,徐晋,陈力群.渤中25-1油田沙河街组低孔低渗储层特征及分类评价[J].现代地质,2010,24(4). |
| 作者姓名： | 杨玉卿 潘福熙 田洪 徐晋 陈力群 |
| 作者单位： | 1. 中海油田服务股份有限公司,油田技术事业部,北京,101149 2. 中海石油(中国)天津分公司,天津,300452 3. 中国地质大学,地下信息探测技术与仪器教育部重点实验室,北京,100083 |
| 摘 要： | 渤中25-1油田位于渤海南部海域,其主力油层为古近系沙河街组,总体上属于低孔低渗储层。通过薄片、扫描电镜、X衍射分析和测井解释等手段,对沙河街组砂岩储层的岩石学特征、沉积特征、物性和孔隙结构特征进行了分析研究。沙河街组沙三段为较深水湖泊环境下的浊积扇沉积,沙二段为扇三角洲沉积;岩性主要为岩屑长石砂岩,储层孔隙类型为混合孔隙、次生孔隙和原生孔隙,由于沙三段溶蚀孔隙发育较沙二段少,沙三段物性较沙二段差。结合储层试油结果,提出了低孔低渗储层宏观成因、微观孔隙结构和综合评价3种分类方案,总体上把储层分为好、中和差3类,对应产能分别为大于80 m3/d、介于10~100 m3/d之间、小于10 m3/d和微量或无产能。经过该油田沙河街组5口井、15个储层段的测试验证,储层宏观成因分类评价结果与实际试油结果符合率达到86.67%,微观孔隙结构分类和综合分类评价结果与实际试油结果基本吻合。 |
| 关 键 词： | 渤中25-1油田 沙河街组 低孔低渗储层 分类评价 测试验证 |
Characteristics and Classification and Evaluation of Low Porosity and Permeability Reservoir in Shahejie Formation of BZ25-1 Oilfield |
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| YANG Yu-qing,PAN Fu-xi,TIAN Hong,XU Jin,CHEN Li-qun.Characteristics and Classification and Evaluation of Low Porosity and Permeability Reservoir in Shahejie Formation of BZ25-1 Oilfield[J].Geoscience——Journal of Graduate School,China University of Geosciences,2010,24(4). | |
| Authors: | YANG Yu-qing PAN Fu-xi TIAN Hong XU Jin CHEN Li-qun |
| Abstract: | BZ25-1 oilfield is located at southern Bohai Bay.The Shahejie Formation which is the main reservoir is a typical lower porosity and permeability reservoir.For the purpose of studying the petrological characteristics,sedimentary characteristics,physical properties and pore structures of the reservoir,a large numbers of thin sections,scanning electron microscopes,X-ray diffraction analysis and well logging data were analyzed.The sedimentary characteristics of Shahejie Member Ⅲ is of turbidite fan deposition of deep-water lake environment,while Shahejie Member Ⅱ is of fan delta deposits.Debris-feldspar sandstone is the main lithology of this area.The pore types in the reservoir are as follows: mixed pore,secondary pore and primary pore.For the dissolved pore in Shahejie Member Ⅲ is less than that in Shahejie Member Ⅱ,the physical properties of Shahejie Member Ⅲ are worse than those of Shahejie Member Ⅱ.With the oil testing verification of reservoir,three types of classification and evaluation of lower porosity and permeability reservoir which are the macro-causes,microscopic pore structure parameter and comprehensive methods are put forward.Generally the reservoir is subdivided into three categories as follows: good,medium and poor reservoirs,and their corresponding productivity are more than 80 m3/d,between 10 and 100 m3/d,less than 10 m3/d and micro amounts or no productivity,respectively.After the testing verification of 15 reservoirs of the Shahejie Formation in 5 wells of the oilfield,the coincidence rate of the result of macro-causes classification and evaluation and the testing result is 86.67%,and the result of microscopic pore structure parameter classification and evaluation basically tallies with the testing result. |
| Keywords: | BZ25-1 oilfield Shahejie Formation lower porosity and permeability reservoir classification and evaluation testing verification |
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