辽河西部凹陷齐108块莲花油层储层物性特征及影响因素

PHYSICAL PROPERTIES CHARACTERS AND CONTROLLING FACTORS OF LIANHUA RESERVOIR IN QI 108 BLOCK,WEST DEPRESSION,LIAOHE BASIN

西部凹陷莲花油层储层以岩屑砂岩为主,成分成熟度低。通过对测井资料、岩心资料的分析,对莲花油层储层的沉积学特征、储层岩石学特征、储层物性、储层非均质性及影响因素进行了研究。储集砂体主要为扇三角洲前缘亚相辫状河道、河道间湾、河口坝沉积,储集空间为原生粒间孔、次生溶蚀孔。通过储层物性影响因素分析认为沉积环境是影响储层储集性能的地质基础。砂岩矿物成分与砂岩粒径是影响储层储集性能的重要条件,填隙物成分及其含量、成岩作用强弱是影响储层储集性能的主要因素。

In the western depression, Lian hua reservoir mainly consists of lithie sandstone which is at a low compositional maturity. By means of analyzing the core and well logging data, we have studied the sediment logical characters, petrological characters, physical property characters and the controlling factors. Reservoir sand body is made up of braided channel, interchannel and mouth bar sediments of fan delta front subfacies. Reservoir room is primary intergranular pore and secondary emposieu. By analyzing the controlling factors, the depositional environment is the geology basis that influences the storage of Lian hua reservoir; Sandstone mineral composition and granule diameter are the important eondition that influence the storage of Lian hua reservoir; interstitial material and digenesis are the main factor that influence the storage of Lianhua reservoir.