中国石油大学学报（自然科学版）
中國石油大學學報（自然科學版）
중국석유대학학보（자연과학판）
JOURNAL OF CHINA UNIVERSITY OF PETROLEUM(EDITION OF NATURAL SCIENCE)
2014年
6期
32-39
,共8页
商晓飞%侯加根%董越%李燕%唐力%邓孝亮%马克%程远忠
商曉飛%侯加根%董越%李燕%唐力%鄧孝亮%馬剋%程遠忠
상효비%후가근%동월%리연%당력%산효량%마극%정원충
滩坝%同沉积断层%分布规律%沙二段%板桥凹陷
灘壩%同沉積斷層%分佈規律%沙二段%闆橋凹陷
탄패%동침적단층%분포규률%사이단%판교요함
beach-bar%contemporaneous fault%distribution regularity%2nd member of Shahejie Formation%Banqiao Sag
根据测井、地震、岩心等资料,以板桥凹陷沙二段为例,对不同区块滩坝砂体的沉积特征进行对比,在此基础上对滩坝的形成机制和分布规律进行研究。结果表明：板桥凹陷沙二段滩坝储层中单砂体平均厚度大于10 m,累积厚度可接近100 m,除了熟知的粉、细砂岩外,还有许多砾质组分；同沉积断层的活动造成凹陷内部不同断块的滩坝砂体在岩性、岩矿、粒度和沉积构造等方面都具有明显的差异性,从根本上控制了滩坝砂体的沉积机制和分布规律；以同沉积断层为主控因素的滩坝沉积存在两种分布模式,即断层下降盘原地式连续型滩坝沉积和断层上升盘错叠式间歇型滩坝沉积；前者单砂体厚度大,内部夹层发育,以正旋回沉积为主,平面上“依附”同沉积断层下降盘分布；后者更多反映出反旋回相序特征,纵向上相互错叠,平面上呈“条带状”平行湖盆边缘展布。
根據測井、地震、巖心等資料,以闆橋凹陷沙二段為例,對不同區塊灘壩砂體的沉積特徵進行對比,在此基礎上對灘壩的形成機製和分佈規律進行研究。結果錶明：闆橋凹陷沙二段灘壩儲層中單砂體平均厚度大于10 m,纍積厚度可接近100 m,除瞭熟知的粉、細砂巖外,還有許多礫質組分；同沉積斷層的活動造成凹陷內部不同斷塊的灘壩砂體在巖性、巖礦、粒度和沉積構造等方麵都具有明顯的差異性,從根本上控製瞭灘壩砂體的沉積機製和分佈規律；以同沉積斷層為主控因素的灘壩沉積存在兩種分佈模式,即斷層下降盤原地式連續型灘壩沉積和斷層上升盤錯疊式間歇型灘壩沉積；前者單砂體厚度大,內部夾層髮育,以正鏇迴沉積為主,平麵上“依附”同沉積斷層下降盤分佈；後者更多反映齣反鏇迴相序特徵,縱嚮上相互錯疊,平麵上呈“條帶狀”平行湖盆邊緣展佈。
근거측정、지진、암심등자료,이판교요함사이단위례,대불동구괴탄패사체적침적특정진행대비,재차기출상대탄패적형성궤제화분포규률진행연구。결과표명：판교요함사이단탄패저층중단사체평균후도대우10 m,루적후도가접근100 m,제료숙지적분、세사암외,환유허다력질조분；동침적단층적활동조성요함내부불동단괴적탄패사체재암성、암광、립도화침적구조등방면도구유명현적차이성,종근본상공제료탄패사체적침적궤제화분포규률；이동침적단층위주공인소적탄패침적존재량충분포모식,즉단층하강반원지식련속형탄패침적화단층상승반착첩식간헐형탄패침적；전자단사체후도대,내부협층발육,이정선회침적위주,평면상“의부”동침적단층하강반분포；후자경다반영출반선회상서특정,종향상상호착첩,평면상정“조대상”평행호분변연전포。
The sedimentary characteristics of beach-bar sandbodies were compared among different fault-blocks of Es2 in Ban-qiao Sag using the seismic,logging and core data, and the formation mechanism and distribution pattern of beach-bar were studied. The results indicate that the reservoirs of Es2 in Banqiao Sag have single beach-bar sandbodies whose average thick-ness is higher than 10 m,and the cumulative thickness nearly reaches 100 m. In addition to siltstone and fine sandstone, there are also gravel deposits. The contemporaneous faults result in the differences in lithology, mineral, grain size and sedi-mentary tectonics between fault blocks,which fundamentally control the deposition mechanism and distribution regularity of beach-bar sandbodies. There are two kinds of distributary models of the beach-bar sediments where the contemporaneous fault is the main controlling factor:the autochthonous and continuous type of beach-bar deposition in down-throw side of the fault, and the staggered and intermittent type of beach-bar deposition in up-throw side of the fault. The former has thick single sandbody and well developed interlayers,generally presents a positive cycle,and horizontally adjoins the footwall of the con-temporaneous fault. The latter shows more inverse cycle characteristics,has single sandbodies staggering with each other ver-tically,and has a banding distribution which runs parallel to the edge of the lake basin horizontally.
