Evaluation Of The Lianglitage Formation Petroleum Zone In The Central Uplift Zone Of The Tarim Basin

The Central Uplift Belt is located in the central of Tarim Basin.The area has favorable hydrocarbon accumulation conditions of LiangLitage formation,which is a significant potential of oil and gas exploration area.The show of oil and gas found in the area is very good and the reef flat facies reservoirs are developed.The effect of exploration is better.It shows that the LiangLitage formation has very good prospects of oil and gas exploration.But the problems like low degree of exploration and the weak of research make the expected evaluation difficult,which restricted the exploration deployment of LiangLitage formation.So the paper start from the arrangement of accumulation conditions,guided by the mathematical evaluation method to develop the research of hydrocarbon zone evaluation.In order to indicate the direction for further exploration.This paper research was mainly demonstrated to determine the boundary of hydrocarbon migration and accumulation highly based on the study of the basis petroleum geological conditions in the central uplift zone of LiangLitage formation,throughout the perspective of hydrocarbon system,adapting the method of recovering paleo-structural diagram in the period of T74-T60 by using model of basin simulation to recognize the maximum scale.Considerably considering the method of ensuring zones by 4 lines,which are hydrocarbon migration and accumulation boundary line,tectonic unit boundary line,lithological boundary line and faultage boundary line,LiangLitage formation was divided into 11 hydrocarbon zones.For the sake of building the standard of parametric model of zone evaluation,we vitally synthesized the comparison and conclusion of the comprehensive research in stored condition to select 23 parameters in final.In order to perfectly attain the results of the geological condition evaluation and comprehensive evaluation of different blocks in the LiangLitage formation regarding expert experience method and grey correlation method,we strongly suggested subjective and objective weighting method to separately determine the evaluation weight of the LiangLitage formation,for the instance,making reservoir,trap and migration conditions as main control factors to carry out the evaluation of petroleum geological conditions in LiangLitage formation and combining potential zone resource and economic factors to process the comprehensive evaluation.It was shown that the north and northeast of Katake uplift zones are favorable accumulation areas and the north and southeast of Bachu uplift,Awati depression,west of Katake uplift and Maigaiti slope and the north of Tanggubasi zones are potential resource areas stated in the evaluation of petroleum geological conditions in LiangLitage formation.In conclusion,we eventually figured that the favorable zones of the north and northeast of Katake uplift were the optimization suggestions emphasized in comprehensive evaluation and the six potential resource areas,such as Awati depression,southeast and north of Bachu uplift,north of Tanggubasi,east of Katake uplift,Maigaiti slope,were combined as a key area for the next exploration target.