辽河油田曙二区大凌河油层沉积相分析

摘要

Shuer area Dalinghe reservoirs of the Liaohe Oilfield is the Liaohe rift Western Sag three sections. As a result of the western depression of Liaohe rift evolution stage, result is the deposition of multiple cycles. Three sections during the deposition of sand along the lake basin to further expansion, a sharp is declined in the lake basin. The water is into the intensified development of the system as the backbone of turbidite deposition. By coring the core data analysis, the rock color, structure, lithology, composition, structure, mineral and logging elements, and with reference to the background of the study area deposition system are understand, found that the target layer is the development of sublacustrine fan, lake mud phase two depositional systems, and identify sublaeustrine fan fa-cies and lake mud, two large phase, inner fan, middle fan and outer fan three subfacies and the main channel, braided channel and peripheral microfacies six microfacies.%辽河油田曙二区大凌河油层属于辽河断陷西部凹陷沙三段.由于辽河断陷西部凹陷演化的阶段性,导致该地区沉积的多旋回性.沙三段沉积时期,伴随湖盆进一步扩张,湖盆急剧下降,水进加剧,此时发育了以浊积岩为骨干的沉积体系.通过对取心井的岩心资料分析,了解岩石颜色、结构、岩性、成分、构造、矿物及测井相要素,并参考研究区沉积体系背景,发现目的层段发育深水湖底扇、湖泥相两大沉积体系.并识别出湖底扇相和湖泥相两个大相.湖底扇内扇、湖底扇中扇及湖底扇外扇三个亚相及主沟道、辫状沟道、末梢微相等6个微相.