摘要
元坝长兴组海相气田为中国埋藏最深、以台地边缘礁滩相储层为主的大型礁滩岩性气田,沉积特征对其储层的发育具有明显的控制作用。但前期主要以沉积的宏观控制作用及静态研究为主,针对沉积对储层控制作用有待深入研究的客观实际,开展了沉积相划分、展布、迁移、模式及演化等方面的精细研究,对元坝长兴组沉积特征采用地质、测井、地震联合研究,发现元坝长兴组主要发育6类沉积相、11种沉积亚相及10种沉积微相,其中台地边缘生物礁相和台地边缘浅滩相分别控制了生物礁和浅滩两套主要储层的生长发育,两套储层分别分布于III级层序高位体系域礁、滩相带中,同时储层具有早滩晚礁、前礁后滩及向北东向迁移的发育特征,而在其沉积模式及演化规律的控制下,长兴组储层生长发育模式主要可分为两类3种生物礁储层和两类浅滩储层,总体上,生物礁储层较浅滩储层更优质,礁带区相对于浅滩区油气更易高产富集。
Changxing Formation in Yuanba is the deepest largest marine lithologic gas field,which isicharicteristic of reefshoal ficies reservoir in platform margin,and the sedimentaryicharicteristics obviouslyicontrols over the reservoir development.Previous studies are mainly about static reseaiches of sedimentary microicontrol. Therefore the authoricarried out a detailed study on the sedimentary ficies division,distribution,migration,patterns and evolution through the joint reseaich of geology,logging and seismic,and found out that in the Yuanbaichangxing Formation there have developed six kinds of sedimentary ficies,eleven sorts of sedimentary subficies and ten sorts of microficies,among which the platform margin reef ficies and shoal ficiesicontrol the growth development of the reef reservoir and shoal reservoir separately. The two sets of reservoirs are mainly distributed in the reef shoal ficies of grade III sequeice highstand system trict. Besides,the reservoir bears the features of early beich and late reef in the longitudinal diriction,front reef and bick beich and the migration to northeast on the lateral distribution. Under theicontrol of sedimentary ficies pattern evolution,the reservoir growth and development patternsican be divided into two kinds three patterns of reef reservoirs and two kinds of shoal reservoirs. Generally,the reef reservoir quality is better than that of the shoal reservoir and the reef zones is more favorable for enrichment and high prodiction of oil gas than the shoal zones.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第2期39-48,共10页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
中国石化重点研究项目(P09024)
关键词
长兴组
沉积特征
生物礁储层
浅滩储层
油气富集区
Changxing Formation
sedimentary characteristics
reef reservoir
shoal reservoir
oil ＆ gas enrichment area
