论文部分内容阅读
根据塔中I号断裂带西北部良里塔格组沉积特征,塔中III区可划分为开阔台地相和台地边缘相两个相带,开阔台地相可进一步分为台内点礁、台内滩、灰泥丘和滩间海亚相;台地边缘相可划分为礁丘、灰泥丘、台缘滩和滩间海亚相。台缘滩以砂屑滩为主,滩体多呈西北-东南向展布,规模不大,横向连续性较好;开阔台地以滩间海等低能沉积为主,丘、滩规模小。良三段开始出现灰泥丘和礁丘,良二段沉积时期规模增大,与粒屑滩叠置组成多旋回沉积,属于有利的储集相带。
According to the depositional characteristics of the Lianglitage Formation in the northwestern part of Tazhong I fault zone, the Tazhong III area can be divided into two facies belonged to the open platform facies and platform margin facies. The open platform facies can be further divided into intra-platform reefs, Beach, stucco mound and the beach between the Haiya; terrace edge phase can be divided into reef mound, stucco mound, beach and Tan Haiya phase. Taiwan margin of the beach to sandy littoral, the beach body mostly northwest - southeast distribution, small size, horizontal continuity is good; open platform to the beach and other low-energy deposits, mound, beach size small. The first three stages of limestone mound and reef mound appear. The scale of the second member of the Liang 2 Member increased during the deposition period, which is multi-cycle sedimentary with the deposition of the granulite shoal, which is a favorable reservoir facies belt.