Saline-deposits in most basins are formed through evaporation and some are the products of deep thermal brine.Research shows that(1) the formation environments for saline deposits

dominated by evaporate environments in continental lake basins

are favorable for the preservation of organic matters and the generation of hydrocarbon;(2) the upward intrusion of deep thermal fluid enhances transformation ratio of hydrocarbon in source rocks and provides for the formation of inorganic oil and gas accumulations;(3) saline deposits are favorable for the maintenance of high porosity and the formation of secondary pores and fissures in the underlying strata

but sometimes they may cause the plugging of the primary pores

and apart from that

saline deposits themselves serve as excellent hydrocarbon migration pathways or reservoir space.Their presence is regarded as an important condition for the formation of the underlying abnormally-high pressure systems

thus is favorable for the preservation of oil and gas pools;(4) saline deposits have wonderful sealing capacity and make good cap rocks by themselves or in combination with faults;(5) saline deposits have an impact upon the regional structural styles of layers above and under it and controls over migration pathways and accumulation horizons.