It is claimed that more petroleum may be preserved in stratigraphic than in structural traps . 有人主張,地層圈閉也許比構(gòu)造圈閉存有更多的石油。
The result shows that the hydrocarbon resources are abundant , physical properties of the reservoirs are mainly of mid - porosity and mid - low permeability reservoirs , its trap types are mainly of overlying pinchout lithological traps and structural or lithological - structural traps , accumulation conditions are good 結(jié)果表明,研究區(qū)油氣資源豐富,儲層物性主要為中孔中低滲儲層,圈閉類型主要為砂巖上傾尖滅的巖性圈閉和構(gòu)造或巖性構(gòu)造圈閉,成藏條件較好。
The reservoir is located at yishan slope area between jinxi fold belt and tianhuan depression , it has the characters of less structural deformation , overlying hydrocarbon genetic center in upper and lower palaeozoic era , growth of high efficient reservoirs and as well as fast lateral changes of reservoir physical properties , it has the condition of forming non structural traps , which is the major area for gas reservoir exploration in the basin 位于晉西撓褶帶和天環(huán)坳陷間的伊陜斜坡區(qū),因具有構(gòu)造變形微弱,上、下古生界生烴中心疊置,高效儲層發(fā)育,儲集層物性側(cè)向變化快等特點,具備形成非構(gòu)造圈閉優(yōu)越條件,為盆地氣藏勘探約重點區(qū)帶。
( 4 ) the formation and growth of structural traps and stratigraphic - unconformity traps in the area is controlled by three compressive stages of silurian - devonian , late permian - tertiary and oligocene - quaternary ; non - structural and compound traps mainly grew in the early paleozoic . structural traps mostly grew in the late paleozoic and the cenozoic and mostly grew on the north and south belts ; non - structural traps mostly grew in the northern area of the hetian concave . most traps in the area formed or typed at last in the himalayan episode , dispersed on the north and south belts ( 4 )研究區(qū)構(gòu)造與地層不整合圈閉的形成和發(fā)育受志留-泥盆紀、晚二疊世-第三紀、漸新世-第四紀三個擠壓階段的控制;早古生代主要發(fā)育非構(gòu)造圈閉和復(fù)合圈閉,晚古生代和新生代則主要發(fā)育構(gòu)造圈閉:構(gòu)造圈閉主要發(fā)育在南北兩帶上,其次為中帶;非構(gòu)造圈閉主要發(fā)育在和田凹陷以北的地區(qū);研究區(qū)內(nèi)大多數(shù)圈閉是喜山期形成或最終定型的,在南北兩帶都有分布,而海西期圈閉主要分布于研究區(qū)中帶瑪南構(gòu)造帶處。
The distributions of source rocks , reserviors and faults / fissures , and conservation are the critical factors in poolforming and enrichment of gas in the foreland basin . 6 . the thrust belts of longmen mountains are potential prospects in the basin with the concentrated structural traps , strucrural - fissuring traps , and faults connecting between the shallow and middle formations 6 、龍門山山前沖斷帶具有較大的油氣潛力,構(gòu)造圈閉、構(gòu)造-裂縫型圈閉發(fā)育,中淺層構(gòu)造同步發(fā)育或有斷裂溝通,具有中淺層均含氣的特征。