Reservoir Evaluation and Advantageous Area Prediction of Sha2 Formation in Yuanshuang,West Depression,Liaohe Basin
Mao Junli, Zhang Fenglian, Ju Juncheng, Xu Jingxue, Wang Lijun
Exploration and Development Research Institute of Liaohe Branch Company, PetroChina Panjin 124010)
No.2 Petroleum Engineering and Construction Company of LPEB Panjin 124010
Sha2 formation of Yuanshuang area is one of the main oil-bearing series in West Liaohe Depression.The main oil reservoir is fan-delta front sandbodies. Sedimentary and reservoir property decide oil(gas) accumulation besides plenty of oil sources and good trap condition. Different sedimentary microfacies and hydrodynamics resulted in different sandstone grainsize,sorting and porosity structure. The diagenesis during deep burial changed the reservoir character of fan-delta sandbodies to some extent . Compaction and cementation lowered the porosity and permeability.Solution and dedudation obviously improved the porosity and permeability. The relationship between oil/gas bearing properties and original depositional condition , diagenesis and petrophysical property are studied In this paper, Synthetical evaluation and prediction of advantageous reservoir area were carried out to Sha2 formation,this directs the exploration of the study area greatly.
