摘要
在岩心观察的基础上 ,利用惠民凹陷古近系主要取心井粒度分析资料绘制大量粒度概率累积曲线 ,将主要碎屑岩沉积环境的粒度概率曲线特征总结为 :三角洲平原水上分流河道为典型的两段式或三段式 ;三角洲前缘水下分支河道有“一跳一悬夹过渡”式和“低斜多段”式 ,河口坝有“高斜两跳一悬夹过渡”式和“一跳一悬夹过渡”式 ;扇三角洲平原主要表现为“上拱弧形”、较典型的两段式或三段式、“细粒高悬加过渡”式 ,水下辫状河道有一段式、两段式、三段式、多段式和具有两个跳跃次总体的复杂两段式和三段式 ,河口坝具有“低斜三段”式、“高斜多跳一悬”式和“高斜一跳一悬夹过渡”式 ;滩坝沉积物总体特征是“高斜多跳”式 ;风暴沉积物具有“高斜多跳一悬”式、多段式和“高斜一段”式 ;湖底扇中扇辫状沟道沉积有“低斜一段”式或“宽缓上拱形”和“低斜多段”式。图 7参
A large number of probability cumulative grain size curves were plotted, and the probability cumulative grain size curves in the main sedimentary environments of the Paleogene in Huimin sag were summarized on the basis of observation of cores. The distributary channels in delta plane subfacies are of typical bi segment pattern and tri segment pattern, those of the distributary channels in delta front subfacies of “1 bouncing population 1 suspension population transitional zone” pattern and “low slope multi segments” pattern. The river mouth bars in the delta front have two patterns too, i.e. the “high slope 2 bouncing populations 1 suspension population transitional zone” pattern and “1 bouncing population 1 suspension population transitional zone” pattern. The fan delta plane subfacies have uphill arched arc, typical bi segment pattern or tri segment pattern and “excessive suspension population” pattern. The characteristics of the braid channels in fan delta front subfacies are changeable. The river mouth bars in fan delta front subfacies have three kinds of curves: “low slope tri segments” pattern, “high slope multi bouncing population 1 suspension population” pattern and “high slope 1 bouncing population 1 suspension population transitional zone” pattern. The total characteristics of beach and bar's probability cumulative grain size curves are of “high slope and multi bouncing population” pattern. The tempestites have “high slope multi bouncing population 1 suspension population” pattern, multi segments and “high slope 1 segment” pattern. The braid channels in mid sublacustrine fan have “low slope 1 segment” pattern or uphill arched arc and “low slope multi segments” pattern.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第3期103-106,共4页
Petroleum Exploration and Development
基金
国家"十五"重大科技攻关项目 (2 0 0 1BA60 5A0 9)
关键词
惠民凹陷
古近系
沉积环境
粒度概率累积曲线
特征
sedimentary environment
probability cumulative grain size curve
Paleogene
Huimin Sag
