吉林大学学报（地球科学版）
吉林大學學報（地毬科學版）
길림대학학보（지구과학판）
JOURNAL OF JILIN UNIVERSITY(EARTH SCIENCE EDITION)
2014年
5期
1395-1405
,共11页
王伟锋%周维维%周杰%李少龙
王偉鋒%週維維%週傑%李少龍
왕위봉%주유유%주걸%리소룡
金湖凹陷%隐性断裂带%杨村断裂带%形成机制%调节带%隐蔽油气藏
金湖凹陷%隱性斷裂帶%楊村斷裂帶%形成機製%調節帶%隱蔽油氣藏
금호요함%은성단렬대%양촌단렬대%형성궤제%조절대%은폐유기장
Jinhu sag%buried fault zone%Yangcun fault zone%formation mechanism%accommodation zones%buried reservoir
金湖凹陷基底存在北东、北西向两组断裂。北西向基底断裂活动较弱，对盖层变形影响较小，在盖层中多以隐性断裂带显现；北东向基底断裂活动强烈，对凹陷盖层变形影响较大，不仅形成了凹陷东部边界杨村断裂在内的多条显性断裂，而且形成了多条隐性断裂带。凹陷中部的北东向石港显性断裂带将凹陷分割成西部斜坡带和东部凹陷带。东部凹陷带受基底北西向断裂隐性活动的影响呈现南北分段特征。凹陷盖层中还发育了大量近东西走向的三、四级正断层，它们大致平行成带分布，形成了宝应平行雁列式断裂构造带、唐港雁列式断裂构造带、卞闵杨平行雁列式断裂构造带、西斜坡平行入字型断裂构造带、汊涧泥沛平行雁列式断裂构造带等一系列油气富集区带。上述构造带中的油气藏分布明显受到北东和北西向基底断裂活动影响，呈现北东、北西或近南北向成带、成串分布特征。应用区域地质、重磁等资料开展隐性断裂带预测，识别出10条北东向、5条北西向、6条南北向隐性断裂带。沉积盖层中形成的这些隐性断裂带控制了储集砂体分布、改善了储层物性、使隐性圈闭成带成串分布，是油气聚集成藏的有利区带。
金湖凹陷基底存在北東、北西嚮兩組斷裂。北西嚮基底斷裂活動較弱，對蓋層變形影響較小，在蓋層中多以隱性斷裂帶顯現；北東嚮基底斷裂活動彊烈，對凹陷蓋層變形影響較大，不僅形成瞭凹陷東部邊界楊村斷裂在內的多條顯性斷裂，而且形成瞭多條隱性斷裂帶。凹陷中部的北東嚮石港顯性斷裂帶將凹陷分割成西部斜坡帶和東部凹陷帶。東部凹陷帶受基底北西嚮斷裂隱性活動的影響呈現南北分段特徵。凹陷蓋層中還髮育瞭大量近東西走嚮的三、四級正斷層，它們大緻平行成帶分佈，形成瞭寶應平行雁列式斷裂構造帶、唐港雁列式斷裂構造帶、卞閔楊平行雁列式斷裂構造帶、西斜坡平行入字型斷裂構造帶、汊澗泥沛平行雁列式斷裂構造帶等一繫列油氣富集區帶。上述構造帶中的油氣藏分佈明顯受到北東和北西嚮基底斷裂活動影響，呈現北東、北西或近南北嚮成帶、成串分佈特徵。應用區域地質、重磁等資料開展隱性斷裂帶預測，識彆齣10條北東嚮、5條北西嚮、6條南北嚮隱性斷裂帶。沉積蓋層中形成的這些隱性斷裂帶控製瞭儲集砂體分佈、改善瞭儲層物性、使隱性圈閉成帶成串分佈，是油氣聚集成藏的有利區帶。
금호요함기저존재북동、북서향량조단렬。북서향기저단렬활동교약，대개층변형영향교소，재개층중다이은성단렬대현현；북동향기저단렬활동강렬，대요함개층변형영향교대，불부형성료요함동부변계양촌단렬재내적다조현성단렬，이차형성료다조은성단렬대。요함중부적북동향석항현성단렬대장요함분할성서부사파대화동부요함대。동부요함대수기저북서향단렬은성활동적영향정현남북분단특정。요함개층중환발육료대량근동서주향적삼、사급정단층，타문대치평행성대분포，형성료보응평행안렬식단렬구조대、당항안렬식단렬구조대、변민양평행안렬식단렬구조대、서사파평행입자형단렬구조대、차간니패평행안렬식단렬구조대등일계렬유기부집구대。상술구조대중적유기장분포명현수도북동화북서향기저단렬활동영향，정현북동、북서혹근남북향성대、성천분포특정。응용구역지질、중자등자료개전은성단렬대예측，식별출10조북동향、5조북서향、6조남북향은성단렬대。침적개층중형성적저사은성단렬대공제료저집사체분포、개선료저층물성、사은성권폐성대성천분포，시유기취집성장적유리구대。
There are many NE-trending faults and NW-trending faults in the Jinhu sag.NW-trending basement faults are weak with a little influence on the sedimentary cover,while there are NW-trending buried fault zones in the cover.NE-trending basement faults are strong with important influence on the sedimentary cover.The Yangcun fault zone and a lot of NE-trending buried fault zones formed in the sedimentary cover.The Shigang major fault zone divids the Jinhu sag into the western slope belt and the eastern sag belt.The eastern sag belt was influenced by “buried”activity of the NW-trending basement faults presenting as segments from tht north to the south.There are a great quantity of nearly parallel third or fourth-order normal faults in the cover in the Jinhu sag.This fault belts include Bao-Ying parallel-echelon fault belt,Tang-Gang echelon fault belt,Bian-Min-Yang parallel-echelon fault belt, western slope parallel fault belt, Chajian-Nipei parallel-echelon fault belt, contributing to several enriched zone of oil and gas,and this hydrocarbon reservoirs are influenced by NE-trending basement faults and NW-trending basement faults,presenting as NE-,NW-,NS-trending stripe or string.On the basis of regional geological data,gravity and magnetic data,10 NE-trending buried fault zones,5 NW-trending buried fault zones,6 NS-trending buried fault zones are identified.The buried fault zones control the distribution of the sandbody,and improve the reservoir physical property.They make the buried reservoir as zonal distribution,which are favorable zones for hydrocarbon accumulation.
