Dolomite is a high-quality reservoir,and has great potential economic value,but its seismic prediction methods in the case of complex tectonic are not perfect yet.Therefore,on the basis of the drilling core data,the geological and geophysical characteristic regulations of Maokou Formation dolomites are studied by the three-dimensional seismic exploration data.Basedon petrophysical analyses,pre-stack simultaneous inversion was effectively carried out to predict the favorable development area.The study shows that:(1)P-wave impedance Zp and the ration Vp/Vs attributes are the sensitive attribute for distinguishing dolomite from limestone.The distribution prediction of dolomite indicator(DIL) obtained by the integration of them show that,the central axis and the eastward area of the Wolonghe structure are the most favorable development area,and the prediction results highly accord with actual data.(2)Maokou Formation dolomite generally developed on the two wings of the fault,and the larger its thickness is,the closer with the fault.The influence on the thickness of dolomite in the lower wall of the structure by stratum reverse is smaller than that in the upper wall of the structure.
Gao Bo-le, Jin Ji-neng, Yan Jie, Li Yang, Zhao Dan, Wang Jian-yi
. Petrophysics characteristics and distribution prediction of Middle Permian Maokou Formation dolomites in Wolonghe block,eastern Sichuan Basin[J]. Natural Gas Geoscience, 2019
, 30(2)
: 168
-175
.
DOI: 10.11764/j.issn.1672-1926.2018.10.015
［1］Ma Yongsheng,He Dengfa,Cai Xunyu,et al.Distribution and fundamental science questions for petroleum geology of marine carbonate in China[J].Acta Petrologica Sinica,2017,33(4):1007-1020.
马永生,何登发,蔡勋育,等.中国海相碳酸盐岩的分布及油气地质基础问题[J].岩石学报,2017,33(4):1007-1020.
[2]Song Wenhai.Distribution of Permian dolomite and natural gas exploration in Sichuan Basin[J].Natural Gas Industry,1985，5(4):22-23,16,2.
宋文海.四川盆地二叠系白云岩的分布及天然气勘探[J].天然气工业,1985,5(4):22-23,16,2.
[3]Chen Xuan,Zhao Wenzhi,Zhang Liping,et al.Discovery and exploration significance of structure-controlled hydrothermal dolomites in the Middle Permian of the central Sichuan Basin[J].Acta Petrolei Sinica,2012,33(4):562-569.
陈轩,赵文智,张利萍,等.川中地区中二叠统构造热液白云岩的发现及其勘探意义[J].石油学报,2012,33(4):562-569.
[4]Chen Xuan,Zhao Wenzhi,Liu Yinhe,et al.Characteristics and exploration strategy of the Middle Permian hydrothermal dolomite in southwestern Sichuan Basin[J].Acta Petrolei Sinica,2013,34(3):460-466.
陈轩,赵文智,刘银河,等.川西南地区中二叠统热液白云岩特征及勘探思路[J].石油学报,2013,34(3):460-466.
[5]Jin Zhenkui,Feng Zengzhao.Origin of dolostones of the Lower Permian in east Yunnan-west Sichuan-dolomitization through leaching of basalts[J].Acta Sedimentologica Sinica,1999,17(3):383-389.
金振奎，冯增昭.滇东—川西下二叠统白云岩的形成机理—玄武岩淋滤白云化[J].沉积学报，1999,17(3):383-389.
[6]Huang Sijing,Lü Jie,Lan Yefang,et al.The main texture of dolomite of Middle Permian,western Sichuan Basin:Concurrently on the differences with Upper Permian-Triassic,northeast Sichuan Basin[J].Acta Petrologica Sinica,2011,27(8):2253-2262.
黄思静，吕杰，兰叶芳，等.四川盆地西部中二叠统白云岩/石的主要结构类型—兼论其与川东北上二叠统—三叠系白云岩/石的差异[J].岩石学报，2011,27(8):2253-2262.
[7]Shen Ping,Zhang Jian,Song Jiarong,et al.Significance of new breakthrough in and favorable targets of gas exploration in the Middle Permian System,Sichuan Basin[J].Natural Gas Industry,2015,35(7):1-9.
沈平,张健,宋家荣,等.四川盆地中二叠统天然气勘探新突破的意义及有利勘探方向[J].天然气工业,2015,35(7):1-9.
[8]Wang Hua,Shen Hao,Huang Dong,et al.Origin and distribution of hydrothermal dolomites of the Middle Permian in the Sichuan Basin[J].Natural Gas Industry,2014,34(9):25-32.
汪华,沈浩,黄东,等.四川盆地中二叠统热水白云岩成因及其分布[J].天然气工业,2014,34(9):25-32.
[9]Huang Sijing,Li Xiaoning,Huang Keke,et al.Authigenicnon carbonate minerals in hydrothermal dolomite of Middle Permian Qixia Formation in the west of Sichuan Basin,China[J].Journal of Chengdu University of Technology:Science & Technology Edition,2012,39(4):343-352.
黄思静，李小宁，黄可可，等.四川盆地西部栖霞组热液白云岩中的自生非碳酸盐矿物[J].成都理工大学学报：自然科学版，2012，39(4):343-352.
[10]Chen Zongqing.Exploration for natural gas in Middle Permian Maokou Formation of Sichuan Basin[J].China Petroleum Exploration,2007(5):1-11,78.
陈宗清.四川盆地中二叠统茅口组天然气勘探[J].中国石油勘探,2007(5):1-11,78.
[11]Hu Anping,Chen Hanlin,Yang Shufeng,et al.Origin of natural gas and main controlling factors of reservoirs in Wolonghe Gas Field[J].Acta Petrolei Sinica,2008,29(5):643-649.
胡安平,陈汉林,杨树峰,等.卧龙河气田天然气成因及成藏主要控制因素[J].石油学报,2008,29(5):643-649.
甘公网安备 62010202000678号