Font Size: a A A

The Research On Sedimentary System Of Chang4+5 、Chang6 Member Of Yanchang Formation In The Zheng 316 Area Of Zhi Dan Oil Field

Posted on:2015-08-29Degree:MasterType:Thesis
Country:ChinaCandidate:G L WangFull Text:PDF
GTID:2180330503455814Subject:Geology
Abstract/Summary:PDF Full Text Request
On the basis of absorbing and summarizing previous studies,this page integrated use of A variety of theoretical knowledge,Such as Sequence stratigraphy,sedimentology,petroleum geology, and, combined a lot kinds of test and analysis data, inclouding rock casting slice,cathodoluminescence,electron microscopy scanning,Grain size analysis,X-ray diffraction and so on,by this way, we made a basic and detailed program of stratigraphic division and correlation of chang 6 and chang 4+5 oil formation.And then,we divided into different sedimentary microfacies and further analyze the distribution rule of sandstone in this area.At last,we researched the reservoir characteristics and distribution of favorable oil zone in this area.This research focus on chang6-4+5 member of Triassic Yanchang formation.using the mark layer and comparing the cycling and the thickness, we divide Chang 4+5 into two groups, Chang4+51 and Chang4+52.Chang6 oil group is divided into Chang61 Chang62 Chang 63 and Chang64 sands group.Based on the lithology, Physical properties and electrical property of the sandstone,we can recognize the characteristics of every group.Through comprehensive geologic study, Chang4+5 and Chang6 are thought to reflect delta front sub-facies,which including underwater distributary channel, inter distributary bay,estuary dam,Sand sheet,and so on.The sandstone formed in the underwater distributary channel is the most important Sand body,and it controlled by the sedimentary microfacies in the plane,so, the Sand body is widely distribution and the thickness is big in the chang 61 and chang 4+52.Along the NE-SW direction,banded distributary channels are developed.According to the study of the geologieal conditions for oil and gas accumulation, we know Lithologic reservoir is the Main types of reservoir.There are different reservoir accumulation process and Main control factors, depending on different of Source rock,sedimentary facies belt and diagenesis. The sedimentary microfacies decide the place whereSource rock and sandston developed,also,it control the characteristics of reservoir physical property,further on,it influence the Oil and gas distribution regularity.So, based on the sedimentary microfacies and the characteristics of reservoir physical property, some advantageous blocks of oil are Predieted, meanwhile, it Provide the credibility geology gist for further exploration in this area.
Keywords/Search Tags:ZhiDan oil field, Sedimentary facies, Chang 4+5, Chang 6, Property of reservoir, prediction of favourable facies belt
PDF Full Text Request
Related items