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川东长兴组台缘礁滩相储层纵向非均质性特征及形成机制——以川东宣汉盘龙洞长兴组剖面为例
Vertical heterogeneity and formation mechanism of the platform edge reef and bank reservoir in Changxing Formation of eastern Sichuan Basin
投稿时间:2017-04-22  修订日期:2017-11-07
中文关键词:长兴组  台缘礁滩  盘龙洞剖面  储层非均质性  形成机制
英文关键词:Changxing Formation  reef and bank of platform edge  Panlongdong profile  reservoir heterogeneity  formation mechanism
基金项目:国家自然科学基金项目(41402090);"十三五"国家科技重大专项(2016ZX05007002)
作者单位E-mail
秦鹏 长江大学 沉积盆地研究中心, 湖北 武汉 430100  
胡忠贵 长江大学 沉积盆地研究中心, 湖北 武汉 430100 hzg1978@yangtzeu.edu.cn 
吴嗣跃 中国石油西南油气田分公司川东北气矿, 四川 达州 635000  
左洺滔 长江大学 沉积盆地研究中心, 湖北 武汉 430100  
韩露 长江大学 沉积盆地研究中心, 湖北 武汉 430100  
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中文摘要:
      近几年,随着四川盆地海相碳酸盐岩储层勘探的不断加强,碳酸盐岩储层强的非均质性已成为制约礁滩气藏勘探开发的现实问题。以川东宣汉盘龙洞长兴组典型台缘礁滩剖面为研究对象,通过对典型台缘礁滩野外剖面的精细观察,结合镜下薄片及岩矿资料分析,重点探讨了盘龙洞礁滩储层纵向非均质性特征及成因。剖面上礁滩体垂向上存在很强的旋回性和储层非均质性,其储集岩分布、储层厚度、白云岩化程度、溶蚀作用等受海平面周期性的升降变化影响而呈现周期性变化。礁滩储层非均质性受高能相带、海平面升降变化和建设性成岩作用的共同控制,高能相带控制储层原生孔隙的发育,决定了储层的沉积非均质性,白云岩化和溶蚀作用有利于礁滩体储层的形成,大气淡水淋滤改造对于优化储层具有关键作用,海平面升降变化决定了礁滩体旋回性发育,而建设性成岩作用的选择性改造深化了储层非均质性。
英文摘要:
      Currently, with the strengthening of caborate reservoirs exploration in Sichuan basin, strong heterogeneity becomes a practical problem which has seriously hindered the exploration and development of reef and bank gas reservoirs. With the typical reef and bank section of Changxing Formation as the research object, its external features were carefully observed in combination with the analysis of thin sections and rock data, and the authors investigated the reservoir heterogeneity features and formation mechanism of Panlongdong reef and bank profile in Changxing Formation of eastern Sichuan basin. The results show that a strong cyclicity and reservoir heterogeneity can be observed in the vertical direction of Panlongdong reef and bank facies. The reservoir rocks distribution, reservoir thickness, the degree of dolomitization and dissolution phenomenon exhibit cyclic variation with the cyclical change of the sea level. Reef and bank reservoir heterogeneity is controlled by high-energy sedimentary facies, changes of sea level and constructive diagenesis. The high-energy sedimentary facies is the key controlling element of primary pore, which determines the sedimentary heterogeneity. Dolomitization and dissolution are advantageous to the reef reservoir formation. Atmospheric fresh water leaching transformation plays a key role in optimization of the reservoir. Sea-level fluctuation determines the cyclicity of reef and bank development, and selective reform of constructive diagenesis deepens the reservoir heterogeneity.
秦鹏,胡忠贵,吴嗣跃,左洺滔,韩露,2018,川东长兴组台缘礁滩相储层纵向非均质性特征及形成机制——以川东宣汉盘龙洞长兴组剖面为例[J].岩石矿物学杂志,(1):61~74.
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