天然气工业
天然氣工業
천연기공업
NATURAL GASINDUSTRY
2009年
11期
13-15
,共3页
松辽盆地%双城断陷%地质结构%主控断裂%形成机制%构造格局%张扭性断裂%莺山凹陷
鬆遼盆地%雙城斷陷%地質結構%主控斷裂%形成機製%構造格跼%張扭性斷裂%鶯山凹陷
송료분지%쌍성단함%지질결구%주공단렬%형성궤제%구조격국%장뉴성단렬%앵산요함
Songliao Basin%Shuangcheng fault depression%geological architecture%major fault%formation mechanism%structural framework%transtensional fault%Yingshan sag
松辽盆地北部深层双城断陷主控断裂构造形迹复杂,其形成机制和期次一直是争论较大的问题.根据断陷类型分类的依据,对双城断陷主控断裂的构造几何学特征及区域构造应力场进行了分析,指出双城断陷NNE向、NW向和NEE向断裂是在同一构造应力场条件下形成的具有不同性质的主控断裂,NW向(NWW向)和NEE向(NE向)构造为张扭性断裂,控制着双城断陷构造深凹区的形成和发育规模.研究成果为深层天然气富集区域的研究提供了重要的地质依据.通过二维、三维地震连片解释,落实了断陷结构和构造格局,结论认为:莺山凹陷为构造深凹区,规模较大,受张扭性断裂控制,是继徐家围子之后深层天然气勘探的主力接替区.
鬆遼盆地北部深層雙城斷陷主控斷裂構造形跡複雜,其形成機製和期次一直是爭論較大的問題.根據斷陷類型分類的依據,對雙城斷陷主控斷裂的構造幾何學特徵及區域構造應力場進行瞭分析,指齣雙城斷陷NNE嚮、NW嚮和NEE嚮斷裂是在同一構造應力場條件下形成的具有不同性質的主控斷裂,NW嚮(NWW嚮)和NEE嚮(NE嚮)構造為張扭性斷裂,控製著雙城斷陷構造深凹區的形成和髮育規模.研究成果為深層天然氣富集區域的研究提供瞭重要的地質依據.通過二維、三維地震連片解釋,落實瞭斷陷結構和構造格跼,結論認為:鶯山凹陷為構造深凹區,規模較大,受張扭性斷裂控製,是繼徐傢圍子之後深層天然氣勘探的主力接替區.
송료분지북부심층쌍성단함주공단렬구조형적복잡,기형성궤제화기차일직시쟁론교대적문제.근거단함류형분류적의거,대쌍성단함주공단렬적구조궤하학특정급구역구조응력장진행료분석,지출쌍성단함NNE향、NW향화NEE향단렬시재동일구조응력장조건하형성적구유불동성질적주공단렬,NW향(NWW향)화NEE향(NE향)구조위장뉴성단렬,공제착쌍성단함구조심요구적형성화발육규모.연구성과위심층천연기부집구역적연구제공료중요적지질의거.통과이유、삼유지진련편해석,락실료단함결구화구조격국,결론인위:앵산요함위구조심요구,규모교대,수장뉴성단렬공제,시계서가위자지후심층천연기감탐적주력접체구.
Disagreement always exists concerning the formation mechanism and the timing of the major faults with complex structural features in the deep Shuangcheng fault depression in northern Songliao Basin. Analysis of the geometrical features and regional tectonic stress field of the major faults, in combination with the criteria for classification of fault depression, reveal that the NNE-, NW-, and NEE-trending faults are the major faults of various natures formed in the same tectonic stress field. The NW (NWW) and NEE (NE) trending faults are transtensional in nature and control the formation and scale of the deep sag in the Shuangcheng fault depression, providing important bases for research of deep gas accumulation. The geological structure and structural framework of the depression are identified through 2D and 3D seismic interpretation. It is believed that the Yingshan sag, a kind of large-scale deep sag under the control of transtensional faults, is another target for deep gas explo-ration following the Xujiaweizi depression.
