Development characteristics and orientation of tight oil and gas in China

SUN Longde,ZOU Caineng,JIA Ailin,WEI Yunsheng,ZHU Rukai,WU Songtao,GUO Zhi

Table 3 Tight gas accumulation elements in a fault basin.

Reservoir type	Typical formation	Source rock	Reservoir	Cap rock	Types of structure	Types of reservoirs formed	Trap type	Gas-water relationship	Reservoir forming characteristics	Distribution location
Source-reservoir separated type	Daqing: 4^th Member of Yingcheng Formation in Xingcheng	4^th Member of Yingcheng Formation, lake shale and coal of Shahezi Formation	Thick conglomerate of 4^th Member of Yingcheng Formation	Shale of Denglouku Formation	Anticline and fault	Source below reservoir	Anticline, fault block, lithology	The reservoir is distributed in the high part of the structure, with boundary controlled by lithology, same gas-water contact with the volcanic rock of Yingcheng Formation.	Migration through faults, high quality combination of reservoir and cap rock	Positive tectonic zone of the basin
Source-reservoir symbiosis type	Daqing: Shahezi Formation in Anda	Lake shale and coal of Shahezi Formation	Conglomerate of Shahezi Formation	Shale of Denglouku Formation, shale of Shahezi Formation	Slope of fault basin	Reservoir- source in one	Lithology	No bottom or edge water	Source and reservoir interbedded, near source accumulation	Slope of the fault basin