摘要
以岩石学和沉积学研究为基础,通过分析澳大利亚南卡那封盆地Moogooloo组储层的碎屑成分、结构特征和孔隙类型,明确了储层的岩石学特征,根据沉积构造、测井曲线和粒度累计曲线研究了储层的沉积学特征。研究表明,Moogooloo组储层岩性为中粒—细粒的石英砂岩和亚石英砂岩,孔隙类型为残余原生粒间孔隙和粒内溶蚀孔隙;该套地层形成于中亚丁克斯期,沉积环境为水动力条件较弱的辫状河。在此基础之上,从沉积作用和成岩作用两个方面分析了储层物性影响因素,其中后者主要包括压实作用、胶结作用和溶蚀作用,具体来讲,沉积作用控制着原始孔隙的发育,很大程度上决定了储层物性;而石英的次生加大是导致储层孔隙度下降的最主要原因。对南卡那封盆地Moogooloo组储层主控因素的系统研究有助于该储层下一步的评价和勘探,而层序和储层物性之间规律的初步探讨对于层序地层学的进一步应用有着积极的意义。
Based on the studies of petrology and sedimentology, the petrologic characteristics of Moogooloo reservoir are clarified through the analysis of clastic constituents, structural feature and pore types. Similarly, the sedimentary characteristics are elaborated via the research of sedimentary structure, well-logging data and grain size accumulation curve. The research results show that the lithology of the Moogooloo reservoirs in the research area is quartz sandstone and subarkose, with residual primary intergranular pores and intragranular dissolution pores. The Moogooloo Formation was deposited in middle Artinskian and the sedimentary environment was braided river accompanied with weak hydrodynamic environment. Based on the above research, the factors affecting the physical property of reservoir are analyzed from the perspectives of sedimentary process and diagenesis, while the latter one mainly includes compaction, cementation and denudation. More specifically, the sedimentary process controls the development of the primary pores and, to a great extent, the physical property of the reservoir, while the quartz overgrowth is the most significant factor which triggers the decrease in the reservoirs porosity. The systematic research of main factors of Moogooloo Formation in Southern Carnarvon Basin is helpful for the assessment and exploration of next step, while the elementary discussion of the regulation between stratigraphic sequence and physical property of reservoir exerts a positive influence on further application of stratigraphic sequence.
出处
《中国石油勘探》
CAS
2012年第5期48-54,83,共7页
China Petroleum Exploration
基金
中国石油天然气股份有限公司重大科技专项"全球石油地质和油气聚集规律研究"(2008ZX05028-003)
