Characteristics and Integral Prediction of Deep-buried Dolomite Reservoirs in Tazhong Area of Tarim Basin

The dolomite strata from lower Ordovician to Cambrian in Tarim Basin were thick and wide distribution,moreover,it had multiple sets of combinations of source rock,reservoir and cap-rock.Additionally,the matrix and secondary pores,and fractures were well developed,which was the beneficial area for hydrocarbon exploration.However,as the dolomite was deeply buried,current exploration was on a low level and maturity prediction technology was not yet formed.In this paper,by comparing and analyzing the geology,rock physics and seismic response characterizations of limestone and dolomite reservoirs,better technologies for limestone reservoir prediction are applied to dolomite reservoir prediction.The pre-stack reservoir prediction is performed based on the study of rock physics in the dolomite reservoir in Cambrian,the controlling factor of reservoirs in different strata are discussed.The research provides guidance for further study of dolomite reservoir exploration in Tarim Basin.