油气藏评价与开发
油氣藏評價與開髮
유기장평개여개발
2014年
2期
24-28
,共5页
王胜男%付宪弟%赵程%马世忠%单佳梅
王勝男%付憲弟%趙程%馬世忠%單佳梅
왕성남%부헌제%조정%마세충%단가매
两井地区%长岭凹陷%扶余油层%成藏模式%主控因素
兩井地區%長嶺凹陷%扶餘油層%成藏模式%主控因素
량정지구%장령요함%부여유층%성장모식%주공인소
Liangjing area%Changling sag%Fuyu layer%reservoir forming model%main controlling factor
在深入解剖两井地区断裂和储层分布规律的基础上，通过油藏解剖和油藏成藏条件空间配置关系，对两井地区扶余油层油运聚成藏机制和主控因素进行了研究。油源区内油藏运聚成藏模式为：长岭凹陷青一段源岩生成的油在超压作用下通过T2油源断裂向下“倒灌”运移进入扶余油层后，再在浮力作用下沿断裂、砂体向高断块圈闭进行短距离的运聚成藏。源内油成藏主要受控于：T2油源断裂控制着油运聚的部位；距离T2油源断裂的远近控制着产能的大小。油源区外油运聚成藏模式为：长岭凹陷扶余油层中的油首先经油源断裂向下“倒灌”运移至扶余油层，再在浮力作用下沿被断裂沟通的砂体侧向运移至邻凹斜坡断层-岩性圈闭中聚集成藏。源区外扶余油层油成藏主要受控于：位于两井古鼻状构造轴部及两翼的圈闭更易成藏；断裂展布方向控制着油气的富集。源岩、断裂和砂体的合理匹配是扶余油层成藏的关键因素。综合上述研究可以得到油源区内T2油源断裂附近和油源区外古鼻状构造两翼运移路径附近北西向断裂、砂体均发育区应为油勘探的有利目标。
在深入解剖兩井地區斷裂和儲層分佈規律的基礎上，通過油藏解剖和油藏成藏條件空間配置關繫，對兩井地區扶餘油層油運聚成藏機製和主控因素進行瞭研究。油源區內油藏運聚成藏模式為：長嶺凹陷青一段源巖生成的油在超壓作用下通過T2油源斷裂嚮下“倒灌”運移進入扶餘油層後，再在浮力作用下沿斷裂、砂體嚮高斷塊圈閉進行短距離的運聚成藏。源內油成藏主要受控于：T2油源斷裂控製著油運聚的部位；距離T2油源斷裂的遠近控製著產能的大小。油源區外油運聚成藏模式為：長嶺凹陷扶餘油層中的油首先經油源斷裂嚮下“倒灌”運移至扶餘油層，再在浮力作用下沿被斷裂溝通的砂體側嚮運移至鄰凹斜坡斷層-巖性圈閉中聚集成藏。源區外扶餘油層油成藏主要受控于：位于兩井古鼻狀構造軸部及兩翼的圈閉更易成藏；斷裂展佈方嚮控製著油氣的富集。源巖、斷裂和砂體的閤理匹配是扶餘油層成藏的關鍵因素。綜閤上述研究可以得到油源區內T2油源斷裂附近和油源區外古鼻狀構造兩翼運移路徑附近北西嚮斷裂、砂體均髮育區應為油勘探的有利目標。
재심입해부량정지구단렬화저층분포규률적기출상，통과유장해부화유장성장조건공간배치관계，대량정지구부여유층유운취성장궤제화주공인소진행료연구。유원구내유장운취성장모식위：장령요함청일단원암생성적유재초압작용하통과T2유원단렬향하“도관”운이진입부여유층후，재재부력작용하연단렬、사체향고단괴권폐진행단거리적운취성장。원내유성장주요수공우：T2유원단렬공제착유운취적부위；거리T2유원단렬적원근공제착산능적대소。유원구외유운취성장모식위：장령요함부여유층중적유수선경유원단렬향하“도관”운이지부여유층，재재부력작용하연피단렬구통적사체측향운이지린요사파단층-암성권폐중취집성장。원구외부여유층유성장주요수공우：위우량정고비상구조축부급량익적권폐경역성장；단렬전포방향공제착유기적부집。원암、단렬화사체적합리필배시부여유층성장적관건인소。종합상술연구가이득도유원구내T2유원단렬부근화유원구외고비상구조량익운이로경부근북서향단렬、사체균발육구응위유감탐적유리목표。
Based on the deeply study of faults and reservoir distribution, through reservoir anatomy and space configuration of reser-voir forming conditions, this paper studies oil accumulation mechanism and its main controlling factors of Fuyu layer in Liangjing area. In oil source area of Qing-1 formation, Changling sag, reservoir migration and accumulation mode is that the oil generated from source rock migrates downward into Fuyu layers through the passageway of the T2 oil source faults under overpressure, and then under the effect of buoyancy, the oil migrates short distance along the faults, accumulating in the high block traps. In oil source area, reservoir forming mechanism is controlled by two factors, one is that T2 oil source faults controls the place of oil accu-mulation;the other one is that the distance to T2 oil source faults controls deliverability. Outside oil source area of Fuyu layer, Chan-gling sag, reservoir migration and accumulation mode is that the oil migrates downward into Fuyu layers through the passageway of oil source faults, and then laterally migrates along sand bodies connected by faults under the effect of buoyancy, accumulating in concave slope faults, namely lithologic traps. Outside oil source, reservoir forming mechanism is controlled by two factors, one is that the traps located in axis and two wings of ancient nose structure accumulate more easily, the other one is that the direction dis-tributions of faults control hydrocarbon enrichment. The reasonable match of mother rock, faults and sand body is the key to oil ac-cumulation. The researches show that the region near T2 oil source faults in oil source area, and northwest trending faults and sand body development zone near migration path of two ancient nose structure wings outside oil source area should be favorable targets for oil exploration.
