渤中19-6构造变质岩潜山优质储集层识别与产能预测

doi:10.7657/XJPG20250107

摘要/Abstract

摘要：

裂缝作为渤中19-6构造变质岩潜山储集层主要渗流通道和储集空间，控制了优质储集层形成及单井产能。为了精确识别渤中19-6构造优质储集层，并进行产能预测，利用岩石薄片、成像测井等资料对裂缝进行定量表征。在潜山储集层垂向结构单元划分基础上，利用常规录井、测井以及成像测井资料，识别目的层段优质储集层，并引入裂缝发育指数法和综合指数法对其进行精细评价，建立优质储集层综合评价方法。将优质储集层有效厚度与裂缝参数代入产能评价方程，计算目的层段气层产能，并与测试结果进行对比，米采气指数的预测值与实际产能值相对误差小于15%，表明该综合评价方法识别变质岩潜山优质储集层可行性高，对渤中19-6构造变质岩潜山油气开发有一定指导意义。

关键词: 渤中19-6构造, 变质岩潜山储集层, 裂缝特征, 储集层识别, 产能预测

Abstract:

In the Bozhong 19-6 structure, fractures serve as the primary flow channels and storage spaces in the metamorphic buried-hill reservoirs, significantly controlling the formation of high-quality reservoirs and well productivity. To accurately identify high-quality reservoirs in the Bozhong 19-6 structure and predict their productivity, fractures were quantitatively characterized using thin sections, imaging logs, and other data. Based on the division of vertical structural units within the buried-hill reservoirs, high-quality reservoirs in the target intervals were identified using conventional mud log, wireline and imaging logging data. The reservoirs were finely evaluated by introducing fracture development index and comprehensive index methods and then a comprehensive method for identifying high-quality reservoirs was established. By substituting the effective thickness and fracture parameters of the high-quality reservoir into productivity evaluation equation, the gas layer productivity of the target intervals was calculated and compared with the test results. It is found that the relative error between the predicted productivity index per meter and the actual productivity values is less than 15%, which indicates a high feasibility of this comprehensive evaluation method in identifying high-quality reservoirs in metamorphic buried hills. This study offers a guidance for oil and gas development in the metamorphic buried hills in the Bozhong 19-6 structure.

Key words: Bozhong 19-6 structure, metamorphic buried-hill reservoir, fracture characteristic, reservoir identification, productivity prediction

中图分类号:

TE122

谭忠健, 郭康良, 吴立伟, 张国强, 李鸿儒, 邓津辉, 毕宏日. 渤中19-6构造变质岩潜山优质储集层识别与产能预测[J]. 新疆石油地质, 2025, 46(1): 57-63.

TAN Zhongjian, GUO Kangliang, WU Liwei, ZHANG Guoqiang, LI Hongru, DENG Jinhui, BI Hongri. Identification and Productivity Prediction of High-Quality Reservoirs in the Metamorphic Buried Hills of the Bozhong 19-6 Structure[J]. Xinjiang Petroleum Geology, 2025, 46(1): 57-63.

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储集层类型	录井特征	常规测井特征	成像测井特征	阵列声波特征
裂缝-孔隙型储集层	钻时和地层可钻性指数降低，气测全烃值显著上升	低密度，高声波时差，高补偿中子，低电阻率	次生孔隙较发育，沿暗色正弦曲线见黑斑分布，成像图整体偏暗，孔隙度谱形态宽且居于右侧	各向异性不显著
孔隙-裂缝型储集层	钻时和地层可钻性指数降低，气测全烃值显著上升	低密度，高声波时差，高补偿中子，较低电阻率	裂缝较发育，有暗色正弦曲线显示，有黑斑分布，孔隙度谱形态较宽且居于中间	各向异性较显著
裂缝型储集层	钻时和地层可钻性指数降低，气测全烃值显著下降	较高密度，较低声波时差，较高电阻率	裂缝成组发育，有暗色正弦曲线显示，孔隙度谱形态窄且居于左侧	各向异性显著

储集层类型	录井特征	常规测井特征	裂缝发育指数	综合指数
优质储集层	地层可钻性指数较小；气测全烃值为高值	双侧向电阻率为正差异，电阻率出现高背景下低阻，声波时差和补偿中子较高，密度较小	<0.5	>0.3
无效储集层	地层可钻性指数较大；气测全烃值为低值	双侧向电阻率为负差异，电阻率为高阻，声波时差和补偿中子较低，密度较大	>0.5	<0.3

井名	裂缝密度/ （条·m^-1）	裂缝孔隙度/ %	储集层渗透率/ mD	米采气指数/ （m³·d^-1·MPa^-1·m^-1）
渤中19-6-D井（测试段1）	1.14	0.110	0.190 000	58.194
渤中19-6-D井（测试段2）	1.85	0.280	0.440 000	124.472
渤中19-6-B井	1.03	0.013	0.000 730	24.106
渤中19-6-E井	0.32	0.024	0.001 970	2.799
渤中19-6-C井	0.21	0.007	0.000 095	0
渤中19-6-F井	0.20	0.009		0