| 作 者：于洲1,孙六一2,吴兴宁3 ,吴东旭3,姚学辉1,丁振纯3 |
| 单 位：1 中国石油大学（北京）；2 中国石油长庆油田公司；3 中国石油杭州地质研究院 |
| 基金项目：受国家“十二五”大型油气田及煤层气开发重大专项课题（2011ZX05004原002）资助 |
| 摘 要： |
| 以靖西地区钻遇或钻穿中组合储层的钻井资料为基础,通过岩心观察、薄片鉴定、物性分析等手段,对该区奥陶系马家沟组中组合的白云岩储层特征及主控因素进行了研究。储集层岩性主要为粉晶白云岩、泥粉晶白云岩及泥晶白云岩等,它们在薄片资料统计中出现的频率分别为33%、21%、15%,属于白云岩型储层。储集空间以晶间孔和晶间溶孔为主,溶洞和溶缝次之,具有低孔、低渗特征,孔隙度以1%～3%居多,占45%,渗透率以(0.001～0.1)×10-3μm2 最多,占74%。储层的形成明显受沉积相和成岩作用控制,白云岩坪和颗粒滩是储层发育的有利相带,白云石化作用和表生岩溶作用是储层孔隙发育的主要成因。 |
| 关键词：马家沟组；储层特征；控制因素；成岩作用；靖西地区；鄂尔多斯盆地 |
| Author's Name: Yu Zhou, Sun Liuyi,Wu Xingning, Wu Dongxu, Yao Xuehui, Ding Zhenchun |
| Institution: China University of Petroleum |
| Abstract: |
| Based on observation of well core samples and sections and physical analysis for the middle array of Ordovician Majiagou dolostone reservoirs to the west of Jingbian Gas Field, it is shown that the reservoir rock mainly consist of siltcrystal dolostone, siltcrystal-micrite dolostone and micrite dolostone in lithology, which occupy 33%, 21% and 15% respectively in statistical rock sections. The types of Primary reservoir space are intercrystalline pores and intercrystalline dissolved pores in dominant, followed by karst caves and solution fractures. The reservoirs are characterized of low porosity and low permeability. The porosity is 1%～3% which takes 45.82% of total samples and the permeability is 0.001～0.1 mD which takes 74.4%. Development of the reservoirs is obviously controlled by sedimentation and diagenesis. Dolostone tidal flats and grainstone shoals are the good sedimentary facies.Dolomitization and epi-karstification are the main contribution to reservoir pore formation. |
| Keywords: Ordovician; Majiagou Formation; Reservoir characteristics; Controlling factor; Jingbian Gas Field;Ordos Basin |
| 投稿时间： 2012-03-18 |
