Study on Sedimentary Characteristics and Models of River Group Sequence

2014 ◽  
Vol 608-609 ◽  
pp. 1141-1146
Author(s):  
Zheng Shi ◽  
Long Wei Qiu ◽  
Yong Qiang Yang
Keyword(s):  
Clear Understanding ◽  
Delta Front ◽  
Sequence Stratigraphic ◽  
Sedimentary Characteristics ◽  
Stratigraphic Framework ◽  
Depositional System ◽  
Sand Body ◽  
System Tracts ◽  
Mud Logging ◽  
Core Description

Zhunzhong area Qingshui River group has top and bottom boundaries,which are not clear,and research on the evolution of the lack in sequence stratigraphic framework of deposition and on the reservoir sand body types do not have a clear understanding problem.In seismic interpretation, core description and based on the analysis of the related test,combining with the mud logging and well logging data,for the redefinition of Qingshui River group on the top and bottom boundaries,it identifies 6 time significance of sequence boundary,taking Qingshui River group can be divided into 2 sequences, 5 system tracts;clear and definite the study area mainly developed delta lacustrine depositional system,which can be further divided into the delta front subfacies, beach bar facies and semi deep lake subfacies. It takes an analysis on the sedimentary characteristics and distribution rules of different types, and it controls effect of topography and hydrodynamic conditions on deposition system, and then puts forward the corresponding sedimentary patterns.

Sedimentary Microfacies Analysis of Xingbei 1-3 Zone in Daqing Oilfield

2013 ◽  
Vol 734-737 ◽  
pp. 436-439
Author(s):  
Bai Quan Yan ◽  
Xue Jing Ma ◽  
Li Hui Yuan ◽  
Gui Pu Jing
Keyword(s):  
Spatial Distribution ◽  
High Resolution ◽  
Microfacies Analysis ◽  
Residual Oil ◽  
Body Type ◽  
Sequence Stratigraphic ◽  
Stratigraphic Framework ◽  
Sand Body ◽  
Sedimentary Microfacies ◽  
Oilfield Development

Putaohua reservoir is the principal producing formation in Daqing oilfield Xingbei block. The spatial distribution of single sand body is particularly important for the residual oil tapping in the middle-late stage of oilfield development. The paper studied sedimentary microfacies of Putaohua reservoirs in the zone, established high-resolution sequence stratigraphic framework of the area and a typical single sand body logging phase mode on the basis of logging features, finely portrayed single sand body type and spatial distribution on this basis to lay the solid geological foundation for oilfield subsequent residual oil tapping and provide a scientific geology guide.

Characteristics of Sedimentation Evolution Based on the Sequence Stratigraphic Frameworks in Shahezi Formation of Southern Xujiweizi Fault Depression

2014 ◽  
Vol 1010-1012 ◽  
pp. 1359-1364
Author(s):  
Ang Li ◽  
Lai Xing Cai ◽  
Shuang Liu ◽  
Qi Li
Keyword(s):  
Sequence Stratigraphy ◽  
Developmental Stages ◽  
Second Grade ◽  
Lake Basin ◽  
Sequence Stratigraphic ◽  
Sedimentary Evolution ◽  
Stratigraphic Framework ◽  
Stratigraphic Division ◽  
Facies Types ◽  
System Tracts

Many scholars in China introduced the theory of sequence stratigraphy,applying to Chinese continental fault depression lake, they have made a lot of achievements in scientific research. However, there are still a lot of controversy according to the establishment in Shahezi group of sequence stratigraphic framework in Xujiaweizi fault depression.Sequence boundary identification method in this paper is based on the “instruction of Vail’s sequence stratigraphy theory, identification of seismic unconformity, verification by using logging methords”. And, following the principle of isochronous ,sequence stratigraphic framework of this region is established clearly. The southern Xujiaweizi fault depression in Shahezi group is divided into 1 second grade sequence, in the interior distributed SQ1-SQ4 4 third grade sequences from the bottom. Developmental stages at the bottom of SQ1 and the top of SQ4, basin is small and water is shallow. However, Developmental stages in SQ2 and SQ3,water enters the lake basin continuously, formed a sedimentary background of “wide basin and deep water”. In addition, each of the three grade sequence has split structure, the lake transgressive domain and lake regression domain two system tracts. Besides, the reversed order para-sequence sets caused by the lake regression and progradation set on the positive para-sequence sets caused by the lake transgression and retrogradation. On the basis of sequence stratigraphic division and correlation, conbined with the regional construction and the supply of provenance ,the sedimentary sequence framework of evolution characteristics are studied.That fan delta,braided river delta, lacustrine are the main facies types in study area. Characteristics of sedimentary evolution there are like this: the characteristics of sedimentation evolution show framework controls sand, succession of evolution, separated-source sedimentary, contiguously distribution.

Researches on Sequences Stratigraphy of Neogene in Huanghekou Sag, Bohai Bay Basin, China

2013 ◽  
Vol 734-737 ◽  
pp. 507-510
Author(s):  
Yong Tao Ju ◽  
Hao Liu ◽  
Chun Chen Zhao ◽  
Tao Guo
Keyword(s):  
Current Data ◽  
Petroleum Exploration ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Southeastern Part ◽  
Sequence Stratigraphic ◽  
Stratigraphic Framework ◽  
Sand Body ◽  
Geologic Setting ◽  
Set Up

The Huanghekou Sag, as an important oil-bearing zone, is located in the southeastern part of the Bohai Bay basin. It has higher values for petroleum exploration-especially in Neogene. The Neogene was a depressional lacustrine period and was characterized with both tectonically stable and gentle topography. Thus it is difficult to identify and subdivide sequences using the traditional method. Based on the practical geologic setting and current data of the Neogene of Huanghekou Sag, using the new method to set up the isochronous sequence stratigraphic framework. By analyzing climate cycle, drilling well and logging cycle, seismic cycle and the identification of unconformity of seismic and drilling well and logging data, the Neogene was divided into 5 third-order sequences and 10 systems tracts. In different sequence sets and systems tract, which was controlled by climate, ratio rate between sedimentary being supplied and accommodated, the sand body scale was different.

Daqing Oilfield Sanan Putaohua Reservoir Sedimentary Microfacies Research

2013 ◽  
Vol 321-324 ◽  
pp. 886-889
Author(s):  
Bai Quan Yan ◽  
Dong Zhang ◽  
Er Shuang Gao
Keyword(s):  
Spatial Distribution ◽  
High Resolution ◽  
Late Stage ◽  
Residual Oil ◽  
Body Type ◽  
Sequence Stratigraphic ◽  
Stratigraphic Framework ◽  
Sand Body ◽  
Sedimentary Microfacies ◽  
Oilfield Development

Putaohua reservoir is the principal producing formation in the Daqing oilfield sanan block. The spatial distribution of single sand body is particularly important for the residual oil tapping in the middle-late stage of oilfield development. The paper studied sedimentary microfacies of Putaohua reservoir in the area, established high-resolution sequence stratigraphic framework of the area and a typical single sand body logging phase mode on the basis of logging features, finely portrayed single sand body type and spatial distribution on this basis, laied the solid geological foundation for the oilfield subsequent residual oil tapping, provided a scientific geosteering.

Framework of Sequence Stratigraphy Sedimentary System and Evolution of Yimin Formation in Yimin Depression

2013 ◽  
Vol 734-737 ◽  
pp. 71-80 ◽  
Author(s):  
Bi Ao Guo ◽  
Long Yi Shao ◽  
Sheng Zhang ◽  
Kang Yang Qing ◽  
Ming Ming Wang
Keyword(s):  
Flood Plain ◽  
Structure Evolution ◽  
Cumulative Probability ◽  
Delta Front ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Stratigraphic Framework ◽  
Sedimentary System ◽  
Well Data ◽  
Object Of Study

Well data, cores, logging, connecting with the characteristic of structure evolution are used to establish the sequence stratigraphic framework of the coal-bearing formation of Yimin Depression in Early Cretaceous. The coal-bearing formation can be divided into two three-order sequences and Yimin Formation, as one of the three-order sequences,is the most important object of study. Through cores description, research of Spontaneous Potential and Resistivity curve shape and analysis of sedimentary Cumulative Probability Size Curve, four facies including fan delta, braid river delta, sublacustrine fan and lake,and some subfacies are identified in Yimin Formation in the sequence stratigraphic framework. Coal-rich belts develop in the southwest delta plain and northwest interdeltaic bay in Yimin Depression. According to the characteristic of the development of coal and sedimentary system, two kinds of coal accumulation models, shallow lake and flood plain in delta front and interdelta, are concluded in Yimin Depression.

scholarly journals Sedimentary Facies of the Chang 2 Member of Yanchang Formation in Area A of Northern Shaanxi

2021 ◽  
Vol 290 ◽  
pp. 02012
Author(s):  
Yingzhi Liu ◽  
Yanyan Liu ◽  
Ying Chen ◽  
Shasha Yang ◽  
Bowang Wang
Keyword(s):  
Sedimentary Facies ◽  
Stratigraphic Correlation ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Base Level ◽  
Sand Body ◽  
Single Well ◽  
Northern Shaanxi ◽  
Core Description ◽  
Sand Bodies

In order to promote the rolling exploration and development of oil reservoirs in northern Shaanxi, a fine study of sedimentary facies in area A has been carried out. Using core and logging data, on the basis of identifying different levels of sequence interfaces and lake flooding, the Chang 2 Member in Area A was divided into two base level cycles, and a high-resolution sequence stratigraphic correlation was established. On the basis of core description, the analysis of single-well sedimentary facies, continuous-well sedimentary facies and planar sedimentary facies are carried out. It is believed that the Chang 2 member of the study area is a delta plain deposit, dominated by distributary channels, inter-distributary depressions, and natural dike microfacies. There are two to three main rivers in the study area. Both the vertical and the plane show that the length of Chang 22 sand bodies is more developed than the length of Chang 21 sand bodies. Among the three small layers of Chang 22, Chang 221 sand body is relatively well developed, and the channel width and thickness are large, making it the most favorable reservoir.

scholarly journals Coal-bearing strata sequence stratigraphy of Paleogene Meihe Formation, Meihe Basin, NE China

2020 ◽  
Author(s):  
Yueyue Bai ◽  
Qingtian Lü ◽  
Zhaojun Liu ◽  
Pingchang Sun ◽  
Rong Liu ◽  
...  
Keyword(s):  
Sedimentary Environment ◽  
Seismic Profiles ◽  
Coal Seams ◽  
Third Order ◽  
Sequence Stratigraphic ◽  
Delta Plain ◽  
Accommodation Space ◽  
Geochemical Properties ◽  
Stratigraphic Framework ◽  
System Tracts

AbstractThe Meihe Basin is an important Paleogene coal-bearing basin located in the Dunhua-Mishan Fault Zone, northeastern China. Based on a comprehensive study of well logs, seismic profiles, cores and rock geochemical properties, the coal distribution, paleoenvironment evolution within a sequence stratigraphic framework and the accumulation model to explain how coal seams developed in small fault basin were discussed in detail. Three-third-order sequences were identified in the Paleogene Meihe Formation of Meihe Basin and the two coal-bearing sequences are the Lower Coal-bearing Member of Sequence I and the Upper Coal-bearing Member of Sequence III. All three types of system tracts are developed in both sequences, i.e., the lowstand systems tract (LST), the transgressive systems tract (TST), and the highstand systems tract (HST). In LST of Sequence I, fan delta plain marsh is the main coal accumulating environment where coal seams are thin, discontinuous and therefore uneconomic for mining, and it is the same with all coal seams developed in Sequence III. While in TST and HST of Sequence I, lake swamp is the main sedimentary environment where coal seams are thick, continuous, widely distributed, and thus economically attractive for mining. In the study area, the nice thick economical coal seams are usually developed in an ideal stable depositional environment where organic matter accommodation space grows at a balanced rate with peat, in other words, free of sediment input or channel migration. The key findings of this study could provide guidance for the exploration of coal seams in the Meihe Basin and other similar basins.

Porosity Inversion under the Sequence Stratigraphy Framework

2014 ◽  
Vol 989-994 ◽  
pp. 1424-1427
Author(s):  
Wei Yang ◽  
Ming Yi Hu
Keyword(s):  
Reservoir Prediction ◽  
Seismic Section ◽  
Sequence Stratigraphic ◽  
Reservoir Development ◽  
Stratigraphic Framework ◽  
Multiple Attribute ◽  
Great Heterogeneity ◽  
Single Well ◽  
Main Period ◽  
System Tracts

Carbonate reef reservoir buried deeply, show great heterogeneity, Therefore, effective reservoir prediction is the key to the biohermal reservoir. In practical research, based on of the single well sequence stratigraphic framework, combined with these sequence stratigraphic framework and seismic section, found the reservoir development area in the longitudinal, which sq1-HST and sq3-HST is the main period of reservoir development, and then through the seismic Seismic multiple-attribute inversion, predicted porosity of system tracts of reservoir development in the sequence stratigraphic framework. Porosity inversion results shown, Changxing formation reservoir is mainly distributed in the central and north-central of Jiannan area.

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