Several factors influencing hydrocarbon accumulation

including oil source conditions

hydrocarbon carrier system

time-space matching and preservation conditions

are comprehensively analyzed by taking the development of effective source rocks as the main subject to study and taking account of hydrocarbon generation

migration

accumulation and preservation.The exploration potentials of SINOPEC's frontiers in West China are classified into 4 types.There are altogether 9 type Ⅰ acreages

24 typeⅡ acreages

20 type Ⅲ acreages and 17 type Ⅳ acreages.9 acreages in Tazhong of Tarim basin and in Junzhong of Junggar basin are of type Ⅰ

and are the major exploration acreages for discovering large and medium oil and gas fields.The exploration in these acreages should be intensified.It is proposed to actively explore type Ⅱ acreages

comprehensively study type Ⅲ acreages and relinquish type Ⅳ acreages.