Lacustrine shallow water delta has become major target for lithologic hydrocarbon reservoir exploration in continental basins in China. To clarify its sedimentary characteristics and sedimentary models, a comprehensive study of the sedimentary characteristics of small fine-grained shallow water deltas in Member 2 of Shahejie Formation in the upthrown block of Southern Dagang Fault, Qikou Sag was carried out on the basis of rock, electrical and seismic data, and a sedimentary model was established. With analysis of the denudation range and distribution characteristics of heavy minerals in Member 2 of Shahejie Formation, the sediment source was mainly from the northeast; the sedimentary microfacies, such as overwater distributary channels, estuarine dams, submerged distributary channels and sheet sands were identified based on rock, electrical and seismic characteristics; finally, the distribution characteristics of planar sedimentary facies were determined in combination with the sand-to-formation ratio. It was found in the study that the main controlling factors of small fine-grained lacustrine shallow water deltas were tectonic conditions, climate, provenance supply, water depth, lake level variation and topographic slope; under the background of stable tectonic conditions, relatively arid climate, low provenance supply, shallow water depth, declining lake level and gentle topography, local uplift provided sediment sources, and small fine-grained shallow water deltas were developed mainly in delta front and more developed at the estuarine dams. The results of the study provide a new perspective for a comprehensive understanding of the sedimentary characteristics of lacustrine shallow deltas and prospects for hydrocarbon exploration.
Guan Xutong
,
Li Shengli
,
Ma Shuiping
,
Liu Sheng
,
Huang Xiaodi
. Sedimentary Model of Lacustrine Small Fine-grained Shallow Water Delta[J]. Special Oil & Gas Reservoirs, 2021
, 28(5)
: 77
-85
.
DOI: 10.3969/j.issn.1006-6535.2021.05.011
[1] FISK H.Sedimentary framework of the modern Mississippi Delta[J].Journal of Sedimentary Petrology,1954,24(2):76-99.
[2] POSTMA G.An analysis of the variation in delta architecture[J].Terra Nova,1990,2(2):124-130.
[3] 邹才能,赵文智,张兴阳,等.大型敞流坳陷湖盆浅水三角洲与湖盆中心砂体的形成与分布[J].地质学报, 2008, 82(6):813-825.
ZOU Caineng,ZHAO Wenzhi,ZHANG Xingyang,et al.Formation and distribution of shallow-water deltas and central-basin sandb odies in large open depression lake basins[J].Acta Geologica Sin ica,2008,82(6):813-825.
[4] 朱筱敏,潘荣,赵东娜,等.湖盆浅水三角洲形成发育与实例分析[J].中国石油大学学报(自然科学版), 2013, 37(5):7-14.
ZHU Xiaomin,PAN Rong,ZHAO Dongna,et al.Formation and development of shallow-water deltas in lacustrine basin and typical case analyses[J].Journal of China University of Petroleum(Edition of Natural Science),2013,37(5):7-14.
[5] 张昌民,尹太举,朱永进,等.浅水三角洲沉积模式[J].沉积学报,2010, 28(5):933-944.
ZHANG Changmin,YIN Taiju,ZHU Yongjin,et al.Shallow-water deltas and models[J].Acta Sedimentologica Sinica,2010,28(5):933-944.
[6] 郑胜.准中地区三工河组浅水三角洲沉积模式及油气勘探意义[J].特种油气藏, 2019,26(1):87-93.
ZHENG Sheng.Sedimentary pattern of the shallow-water delta in the Sangonghe Formation of central Junggar Basin and its significance for hydrocarbon exploration[J].Special Oil & Gas Reservoirs,2019,26(1):87-93.
[7] ZENG H,ZHU X,ZHU R.New insights into seismic stratigraphy of shallow-water progradational sequences:subseismic clinoforms[J].Interpretation,2013,1(1):35-51.
[8] 唐超.沙河街组沉积微相及储层研究[D].南昌:东华理工大学, 2016.
TANG Chao.The research on sedimentary microfacies and reservoir of Shahejie Formation [D].Nanchang:East China University of Science and Technology,2016.
[9] 吴杰.黄骅坳陷王徐庄油田沙二三段沉积相研究及有利区预测[D].北京:中国地质大学(北京),2018.
WU Jie.The research on sedimentary facies and prediction for favorable area of the second and third member of Shahejie Formation in Wangxuzhuang Oilfield,Huanghua Depression[D].Beijing:China University of Geosciences(Beijing),2018.
[10] 周立宏,卢异,肖敦清,等.渤海湾盆地歧口凹陷盆地结构构造及演化[J].天然气地球科学,2011,22(3):373-382.
ZHOU Lihong,LU Yi,XIAO Dunqing,et al.Basinal texture structure of Qikou Sag in Bohai Bay Basin and its evolution[J].Natural Gas Geoscience,2011,22(3):373-382.
[11] 李三忠,索艳慧,周立宏,等.华北克拉通内部的拉分盆地:渤海湾盆地黄骅坳陷结构构造与演化[J].吉林大学学报(地球科学版), 2011, 56(5):1362-1379.
LI Sanzhong,SUO Yanhui,ZHOU Lihong,et al.Pull-Apart Basins within the North China Craton:structural pattern and evolution of Huanghua Depression in Bohai Bay Basin[J].Journal of Jilin University(Earth Science Edition),2011,56(5):1362-1379.
[12] 于杰杰.歧口凹陷中南部沙二—沙三段物源与沉积体系研究[D].北京:中国石油大学(北京),2009.
YU Jiejie.A research on provenance and sedimentary system of Es2-Es3 in the middle-south area of Qikou Depression[D].Beijing:China University of Petroleum(Beijing),2009.
[13] 刘群明,王丽娟,饶良玉,等.黄骅坳陷歧口凹陷沙河街组二段物源分析[J].现代地质,2012,26(2):363-369.
LIU Qunming,WANG Lijuan,RAO Liangyu,et al.Provenance analysis of the second member of Shahejie Formation in Qikou Sag of Huanghua Depression[J].Geoscience,2012,26(2):363-369.
[14] 鲁超.渤海湾盆地歧口凹陷沙二段沉积体系分析与砂体预测[D].武汉:中国地质大学(武汉),2010.
LU Chao.Sedimentary system analysis and sandbody prediction of the second member of Shahejie Formation in Qikou Sag,Bohai Bay Basin[D].Wuhan:China University of Geosciences(Wuhan),2010.
