CAJ | 학술논문

松辽盆地榆树林油田下白垩统泉头组四段扶余油层沉积时期发育大型浅水三角洲沉积.本文基于12口探井岩心与2268口钻井资料,通过单井岩心相分析、测井相分析、连井相对比和平面沉积微相研究,认为研究区发育浅水三角洲平原、内前缘、外前缘和前三角洲亚相,以浅水三角洲平原亚相为主,平原分流河道和内前缘水下分流河道为主要沉积微相.在扶三段(FⅢ)早期,研究区主要为浅水三角洲内前缘亚相,物源只来自北部;其后,三角洲向南进积,全区变为平原亚相;FⅢ3小层沉积时期,南部物源进入,并与北部物源交汇,一直持续至扶一段(FⅠ)末期;在FⅠ3小层沉积末期,湖平面快速上升,南北两个三角洲退积,研究区中部依次出现浅水三角洲内前缘、外前缘和前三角洲.
송료분지유수림유전하백성통천두조사단부여유층침적시기발육대형천수삼각주침적.본문기우12구탐정암심여2268구찬정자료,통과단정암심상분석、측정상분석、련정상대비화평면침적미상연구,인위연구구발육천수삼각주평원、내전연、외전연화전삼각주아상,이천수삼각주평원아상위주,평원분류하도화내전연수하분류하도위주요침적미상.재부삼단(FⅢ)조기,연구구주요위천수삼각주내전연아상,물원지래자북부;기후,삼각주향남진적,전구변위평원아상;FⅢ3소층침적시기,남부물원진입,병여북부물원교회,일직지속지부일단(FⅠ)말기;재FⅠ3소층침적말기,호평면쾌속상승,남북량개삼각주퇴적,연구구중부의차출현천수삼각주내전연、외전연화전삼각주.
The Yushulin Oilfield, located in the Sanzhao Depression of the Songliao Basin, developed large shallow-water deltas at the time when the Fuyu Reservoir deposited within the Member 4 of the Lower Cretaceous Quantou Formation. Based on 12 well cores and 2268 well loggings, by ways of single-well facies, logging facies, connecting-wells and plane sedimentary microfacies, well-developed shallow deltas were recognized in the study area in which can be further subdivided into delta plain, internal front, external front, predelta, and delta plain subfacies. Main sedimentary microfacies are plain distributary channel and internal front subaqueous distributary channel. These two types of channelized sandstone bodies interlaced into a network. During the early stage of the Member 3 of the Fuyu Reservoir, the studied area was dominated by shallow-water delta internal front subfacies which was sourced from north only. Later, the delta prograded towards south, and the studied area changed into delta plain subfacies. At the time of the third layer in the Member 3 of the Fuyu Reservoir, source from south appeared and intersected with the northern source. This sedimentary condition continued to the latest stage of the first mewber of the Fuyu Reservoir FⅠAt the time of the third layer of the Member 1, both the northern and southern deltas retrograded due to the sudden rise of lake level. In the middle part of the studied area, delta internal front, external front, and predelta were developed in proper order.