收稿日期: 2015-03-07
修回日期: 2015-04-16
网络出版日期: 2015-10-10
基金资助
国家科技重大专项(编号：2011ZX05004-002);中国石油天然气股份有限公司重大科技专项“深层油气勘探开发关键技术研究”(编号:2014E-32)联合资助.
Scale and Distribution of Marine Carbonate Burial Dissolutional Pores
Received date: 2015-03-07
Revised date: 2015-04-16
Online published: 2015-10-10
埋藏期通过有机酸、TSR及热液等作用可以形成埋藏溶孔，这一观点已为大多数储层地质学家们所接受。随着中浅层油气资源勘探开发程度不断提高、难度不断增大，深层正成为油气战略发展的接替领域之一。但深层油气勘探开发的成本要比中浅层大得多，这就对深层碳酸盐岩储层的规模和预测精度提出了更高的要求。海相碳酸盐岩埋藏溶孔规模与分布规律正成为近期研究关注的焦点，而不仅仅是埋藏溶孔的形成机理。通过塔里木盆地和四川盆地深层碳酸盐岩储层(深度＞4 500m)实例解剖及溶蚀量定量模拟实验、矿物成分对溶蚀强度影响模拟实验、储层物性对溶蚀强度影响模拟实验、岩性和孔隙组合对溶蚀效应影响模拟实验，提出开放体系是埋藏溶孔规模发育的关键、先存孔隙发育带控制埋藏溶孔的分布、储层岩性和孔隙组合控制埋藏溶孔的分布样式等新认识，初步回答了埋藏溶孔的规模和分布规律问题，为深层碳酸盐岩储层评价和预测提供了依据。
沈安江，佘敏，胡安平，潘立银，陆俊明 . 海相碳酸盐岩埋藏溶孔规模与分布规律初探[J]. 天然气地球科学, 2015 , 26(10) : 1823 -1830 . DOI: 10.11764/j.issn.1672-1926.2015.10.1823
It is gradually accepted that pores can be created in burial settings via dissolution by organic acid,TSR derived or hydrothermal fluids.The role of deep-buried carbonate reservoirs is becoming more and more important,since the degree and difficulty in petroleum exploration of shallow strata is increasing.Understandings of the development scale and prediction of deep-buried carbonate reservoirs is economically crucial.In addition to the formation mechanism,scale and distribution of burial dissolution pores in burial settings are the focus in recent studies.This paper,based on case studies of deep-buried (>4 500m) carbonate reservoirs from the Tarim Basin and Sichuan Basin,and dissolution simulation experiments,proposes that open system is of crucial importance in the development of large scale burial dissolution pores,the distribution pattern of which is controlled by lithologies,pre-existing pores and pore throat structures.These findings provide a basis for the evaluation and prediction of deep-buried carbonate reservoirs.
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