摘要
针对胜利油田东营断陷湖盆碳酸盐岩滩坝储层的主控因素不清的实际问题，研究古水深度对碳酸盐岩发育的控制作用。在厚度计算、剥蚀量恢复和压实校正等方法恢复古地貌的基础上，用泥岩颜色、层理规模、古生物及岩心的元素分析资料等综合确定古湖岸线和古水体深度。古水深是碳酸盐岩发育的重要控制因素，不同类型碳酸盐岩沉积受到古水深控制的主要原因是受到化学岩沉积序列的控制，碳酸盐岩发育有利的古水深为3～32m，白云岩与石灰岩对古水深的要求具有一定的差别，最适合的水深分别为20m和25m，随着气候、盐度的周期性变化，在垂向上形成了多期次的石灰岩一白云岩互层沉积。沙四段纯下亚段可以划分为2个中长期碳酸盐岩的蒸发旋回序列，进一步可分为8个短期蒸发旋回序列。
Considering the actual problems of not distinct key controlling factors for the carbonate beach and bar reservoirs in Dongying faulted lake basin of Shengli Oilfield, the controlling actions of palaeo-water depth on the carbonate development are researched. On the basis of the palaeogeomorphic resume by means of the following methods： thickness calculation, denudation recovery, compaction correction and so on, the ancient lake strandline and palaeo-water depth are comprehensively determined by mudstone colors, bedding size, palaeontologic, core element analyzing data and so forth. Palaeo-water depth is the important controlling factor to the development of carbonate rock, and the main reason of different types of rock sedimentation controlled by the depth is due to the sedimentary sequences of the chemicaI rocks, the favorable depth for the above development is from 3 m to 32 m. There are a certain difference required by dolomite and limestone to the depth, the most adaptable depths are re- spectively 20 m and 25 m. With the cyclic changes of climate and salinity, multiple period-times limestone-dolo- mite interbedded sedimentations are formed in vertical. Chun Lower Submember of Sha No. 4 Member can be divid- ed into 2 evaporation cycle sequences for medium and long terms of carbonate rocks, and moreover it can be further classified into 8 short-term evaporation cycle sequences.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第6期27-31,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重大科技专项“渤海湾盆地东营凹陷勘探成熟区精细评价示范工程”（2008ZX05051）资助.
关键词
古水深
碳酸盐岩
滩坝
蒸发旋回序列
palaeo-water depth
carbonate rock l beach and bar
evaporation cycle sequence
