地质与资源2018，Vol.27Issue(1)：77-82,6.
川中磨溪地区龙王庙组沉积相与高频层序对储层的控制
CONTROL OF SEDIMENTARY FACIES AND HIGH-FREQUENCY SEQUENCES ON THE RESERVOIR OF LONGWANGMIAO FORMATION IN MOXI AREA, CENTRAL SICHUAN BASIN
摘要
Abstract
Four sedimentary subfacies of lagoon,inter-shoal sea,grain shoal and dolomitic flat of the Longwangmiao Formation in Moxi area,Central Sichuan Basin are identified by study on the sedimentary facies,high-frequency sequences and reservoir genesis base on the drill cores,thin sections and logging data.The Formation can be divided into two fourth-order sequences while each includes three to five fifth-order sequences separately.The porosity of reservoirs is generally good with the main reservoir space as intercrystalline pores,solution caves and fissures,the main reservoir rocks being finely crystalline,silty and grained dolomites.The favorable reservoirs are obviously controlled by sedimentary facies and high-frequency sequences.Grain shoals and dolomitic fiats are the most porous reservoir facies.The HST in the fourth-order sequences usually shows better reservoir quality than the TST.Early stage dissolution developed near the fourth and fifth order sequence boundary plays the key role on the porosity improvement of dolomitic fiats and grain shoals and also provides basis for the later stage burial dissolution and telogenetic karstification.关键词
沉积相/高频层序/碳酸盐岩/龙王庙组/四川盆地Key words
sedimentary facies/high-frequency sequence/carbonate rock/Longwangmiao Formation/Sichuan Basin分类
天文与地球科学引用本文复制引用
任大伟,江维,高达,杜柳,罗贤富..川中磨溪地区龙王庙组沉积相与高频层序对储层的控制[J].地质与资源,2018,27(1):77-82,6.基金项目
国家自然科学基金“塔中地区晚奥陶世碳酸盐台地边缘沉积演化及其对古构造和海平面变化的响应”(41502104) （41502104）
长江大学大学生创新创业计划项目“川中地区龙王庙组台内滩沉积特征及主控因素研究”(2016017). （2016017）
