Study of the Fluvial Facies Reservoir Sedimentary Characteristics of an Oil Field in China

2013 ◽  
Vol 753-755 ◽  
pp. 66-69
Author(s):  
Sheng Yun Yu ◽  
Qing Yun Meng ◽  
Hai Ying Xu
Keyword(s):  
Sedimentary Environment ◽  
Sedimentary Facies ◽  
Flood Plain ◽  
Oil Field ◽  
Distribution Model ◽  
River Sand ◽  
Meandering River ◽  
Sedimentary Characteristics ◽  
Sedimentary Model ◽  
Sand Body

In this paper, 6 kinds of reservoir sedimentary microfacies distribution model-conceptual model have been established by the use of reservoir sedimentology theory and methods, namely, large sandy braided river sand body sedimentary model, large meandering river sand body sedimentary model, low bending-straight distributary channel sedimentary model, crevasse splay (crevasse river) sedimentary model, heart beach sedimentary model, flood plain and distributary plain sheet sand body sedimentary model. On this basis, the sedimentary facies figures of four sedimentary units have been painted, putting forward the evolution law of sedimentary environment in the research zone, thus providing basic data for the facies control modeling.

A Preliminary Study on Sedimentary Mode of Putaohua Oil Layer in the East of Sanzhao Depression

2012 ◽  
Vol 524-527 ◽  
pp. 3-9
Author(s):  
Lin Cong ◽  
Shi Zhong Ma ◽  
Yu Sun ◽  
Ru Bin Li
Keyword(s):  
Transition Region ◽  
Developmental Process ◽  
Sedimentary Facies ◽  
Oil Field ◽  
Sedimentary Characteristics ◽  
Sand Surface ◽  
Sand Body ◽  
Delta System ◽  
Preliminary Study ◽  
Distributary Channel

Based on ten well cores, seventeen hundred logging data and initial potential data, sedimentary characteristics and mode of shallow lacustrine fluvial-dominated delta of Putaohua oil layer in the east of Sanzhao depression were analyzed. It is realized that distributary channel sandbodies as sand body framework of this delta system, which is abundant, closely and narrow, and the framework of sand body is in a large number of narrow banded shape (mostly 200 ~ 300m), and can extend hundreds of kilometers of continuous, dense, overall was SW, and combines well with other types sand surface to become a better distributary channel sand body. Based on understanding of sedimentary background, developmental process, sedimentary characteristics and sedimentary facies type of Putaohua oil layer in Sanzhao depression, sedimentary mode of shallow lacustrine fluvial-dominated delta is established in the study area, and sedimentary mode of five subfacies is further divided: Delta distributary plain subfacies is mode of fluvial-dominated belt body; Transition region of front-distributary plain is mode of inshore; Inner front is mode of fluvial-dominated belt body; Transition region of inner front-outer front is mode of fluvial-dominated sheet sand; Shallow lacustrine fluvial-dominated delta outer front is mode of tide-dominated sheet sand; Also pointed out that overall shows NE –SW trending submerged distributary channel sandbodies which is abundant, closely and narrow is the main reservoir of the study area. It provides the solid geological basis for the establishment of spatial distribution pattern of reservoir; identify the causes of mainly monosandbody and further tapping the potential of oil field.

Sedimentary characteristics and sand body distributions in the Lower Permian He 8 member, Ordos Basin, China

2021 ◽  
pp. 1-50
Author(s):  
Zhiyuan Lu ◽  
Zhiliang He ◽  
Shizhong Ma ◽  
Yu He
Keyword(s):  
Ordos Basin ◽  
Lower Permian ◽  
Braided River ◽  
River Sand ◽  
Meandering River ◽  
Sedimentary Characteristics ◽  
Fluvial Deposits ◽  
Sand Body ◽  
The Ordos Basin ◽  
Sand Bodies

The Lower Permian He 8 Member (P1h8) in the Ordos Basin is a typical producing zone of tight lithologic gas reservoirs. Analyses of sedimentary characteristics, electrofacies, and sand-body distributions of P1h8, conducted on modern fluvial deposits, outcrops, cores, and well logs, revealed that braided rivers that developed in the Lower P1h8 and Upper P1h8 are characterized by meandering river. Within these fluvial deposits, the procedure consists of analyzing high-resolution sequence stratigraphy and sedimentary dynamics defined from calibrated logging curve signatures and depositional studies. According to modern and ancient fluvial deposits, we have developed a process-based sedimentary conceptual model for interpreting and predicting the distribution and geometries of sand bodies in braided and meandering deposits. The main sand body of the braided river system was bars and channel fill deposits. The braided river sand bodies are distributed over multiple vertical superimpositions and overlapping horizontal connections. The meandering river sand bodies are mainly point-bar deposits, which are bead-shaped and exhibit scattered development in the vertical direction. This comparison indicates that there were significant differences between braided and meandering deposystems. The sand bodies in the Lower P1h8 were multidirectionally connected and primarily distributed in a stacked pattern. In contrast, the sand bodies in the Upper P1h8 were distributed in an isolated manner, and fine grains (mud and silt) were deposited between the sand bodies with poor connectivity. We interpreted the fluvial deposits that control the distributions of the sand body of the He8 Member in the eastern Sulige gas field and constructed a corresponding prediction model of a braided-meandering reservoir. This model will promote understanding of the extent of fluvial deposits and sand-body distribution of P1h8, thus elucidating hydrocarbon-bearing sand units of the Ordos Basin for future exploration.

High Resolution Sequence Stratigraphy Characteristics and Distribution of Donghe Sandstone in Qunkuqiake Region in Tarim Basin

2014 ◽  
Vol 1044-1045 ◽  
pp. 570-573
Author(s):  
Mu Wei Cheng
Keyword(s):  
Tarim Basin ◽  
High Frequency ◽  
Oil And Gas ◽  
Sedimentary Environment ◽  
Sedimentary Facies ◽  
Sequence Stratigraphic ◽  
Sedimentary Characteristics ◽  
Sand Body ◽  
Frequency Sequence ◽  
High Resolution Sequence Stratigraphy

Qunkuqiake Region is an important exploration block in Tarim Basin. Donghe Sandstone is the main oil and gas target stratum. In order to reveal the rules of migration of the sand body and predict the favorable reservoir accurately, two high-frequency cycles are identified in Donghe Sandstone each of which consists of rising hemicycle and descending hemicycle, the sedimentary characteristics are analysed within the sequence stratigraphic framework and the barrier bar subfacies are identified beginning with the sedimentary characteristics of glutenite through the study of drilling stratigraphic section using drilling data, well logging data and cores data. This paper has disclosed the transition of the sedimentary environment from barrier-free coast system to barrier coast system during the period from rising hemicycle to descending hemicycle and the planar distribution of sedimentary facies of different high frequency sequence of Donghe Sandstone.

Research on Sedimentary Facies of Formation of Neogene in Oilfield

2013 ◽  
Vol 340 ◽  
pp. 920-923
Author(s):  
Xiang Xing ◽  
Feng Cai ◽  
Wang Shui Hu
Keyword(s):  
Sedimentary Facies ◽  
Oil Field ◽  
North West ◽  
Meandering River ◽  
Body Distribution ◽  
Abandoned Channel ◽  
Sand Body ◽  
Linear Reservoir ◽  
Channel Bottom ◽  
Core Characteristics

The paper studied the sedimentary system of No.1 and No.2 structure in Nanpu oil field with methods of geological, logging, seismic and chemical analysis, associated with core characteristics, sedimentary structure, profile structure and logging facies. The results demonstrate the following three points. First, Minghuazhen Formation in Nanpu field is meandering river sedimentary, and the channel subphase can be further divided into channel bottom lag deposits, beach, abandoned channel and natural levee. Second, the isopach and sedimentary face map of Minghuazhen Formation are generated based on each well's thickness of sand body and curve characteristics, and show the trend of North West and South West distribution. Third, sand body distribution can be predicted though spatial distribution of sedimentary face. And linear reservoir and Barrage-type reservoir are the two typical zones of Minghuazhen Formation.

scholarly journals Organic Geochemical Characteristics of Mudstone and Marl from Western Hoh Xil Basin of Tibet

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Wentian Mi ◽  
Xueyuan Qi ◽  
Yan Shang ◽  
Xu Kong ◽  
Zifu Hu
Keyword(s):  
Organic Matter ◽  
Higher Plants ◽  
Organic Geochemistry ◽  
Sedimentary Environment ◽  
Sedimentary Facies ◽  
Alluvial Fan ◽  
Maturity Stage ◽  
Type I ◽  
High Productivity ◽  
Sedimentary Characteristics

The mudstone and marl from western Hoh Xil basin, located in Tibet of the west of China, were deposited in Tertiary lacustrine environment. Investigation of organic geochemistry, sedimentary characteristics, and 13C in kerogen was conducted to analyze the sedimentary environment, biomarkers, paleoclimate, and source of organic matter during deposition. The Cenozoic sedimentary facies of the basin included upper lacustrine facies and lower alluvial fan facies, which belong to Miocene Wudaoliang Formation and Oligocene Yaxicuo Group, respectively. The Miocene marl-sandstone-mudstone from Wudaoliang Formation was analyzed. Maceral composition was dominated by amorphous organic matter. T max values indicated that the mudstones were thermally immature-low maturity with mainly type II and III organic matter, while organic matter in marlite belongs mainly to type I-II1 with low maturity-maturity stage. The biomarkers showed the characteristics of odd-over-even predominance of long-chain n-alkanes, higher proportion of C27 sterane in most of the samples, heavy δ13Corg composition, low Pr/Ph ratios (0.11-0.36), and so on. Organic geochemistry indicated that the organic matter originated from bacteria, algae, and higher plants. The rocks were formed in reducing environments with stratified water column and high productivity. The paleoclimate became more humid during depositional stage in the western Hoh Xil basin.

A Study on the Lateral Accretion Body Potential Tapping of the Point Bar

2013 ◽  
Vol 838-841 ◽  
pp. 863-866
Author(s):  
Hong Zhao
Keyword(s):  
Horizontal Wells ◽  
River Sand ◽  
Point Bar ◽  
Meandering River ◽  
Oil Distribution ◽  
Abandoned Channel ◽  
Sand Body ◽  
Remaining Oil ◽  
Body Potential ◽  
Oilfield Development

The channel sand in PI3132 units of A area in Daqing oilfield is meandering river sand body. Although more than 90 percent of it is watering out, the serious heterogeneity in layers make it possible that there are plenty of remaining reserves in unwashed or low-washed segments in water flooded layers. All these two kinds of remaining oil are the main potential tapping objectives in later period of oilfield development.The writer deeply analyzed the point bar sand body of the meandering river, established the recognizing method of the abandoned channel and the lateral accretion body of point bar, understood the remaining oil distribution in the washed segments and unwashed segments of the thick oil layers. By implementing the Personalized treatments for individual wells,such as super-short radius horizontal wells drilling,waterflood depth profile controlling,cyclic injecting and producing, etc, the point bar sand body potential tapping technology for different formation cause has been established. And this has essential meaning to direct the oilfield development.

Sandstone bodies sedimentary characteristics of Shanxi formation, at Chengjiazhuang section in Liulin, Shanxi province, China

2015 ◽  
Vol 12 (2) ◽  
pp. 177-188
Author(s):  
Chao Jin ◽  
LangTao Liu ◽  
GuoQiang Hao ◽  
Kuo Cao
Keyword(s):  
Sedimentary Environment ◽  
Ordos Basin ◽  
Field Measurements ◽  
Sedimentary Facies ◽  
Shanxi Province ◽  
Sample Collection ◽  
Sedimentary Characteristics ◽  
Sample Composition ◽  
Sedimentary Microfacies ◽  
Distributary Channel

Sedimentary facies type of the Shanxi Formation in northeastern Ordos Basin is an ongoing debate. Based on field measurements, sample collection and identification, and laboratory analysis, we systematically evaluated the sedimentary characteristics of the sandstone bodies of Shanxi Formation of Chengjiazhuang section in Liulin. Analysis included identifying sample composition, grain size, texture, sedimentary structure and spatial distribution. We came to the conclusion that the sedimentary environment of Shanxi Formation is deltaic. This deltaic environment included deltaic front and deltaic plain. It can be further divided into five sedimentary microfacies: subfluvial distributary channel, subfluvial distributary interchannel, distributary channel, levee, and peat bog. And lastly, the evolution of sedimentary environment of Shanxi Formation is discussed.

Application of Multiple-Point Geostatistics in Sedimentary Facies Modeling

2014 ◽  
Vol 962-965 ◽  
pp. 108-111
Author(s):  
Hong Dong Li ◽  
Xiao Ling Hu ◽  
Shao Hua Li
Keyword(s):  
Sedimentary Facies ◽  
Training Image ◽  
Oil Field ◽  
Space Distribution ◽  
Reservoir Modeling ◽  
Multiple Point ◽  
Distribution Law ◽  
Facies Model ◽  
Sand Body ◽  
Sedimentary Microfacies

Compared with 2-point variogram-based geostatistics, multiple-points geostatistics is able to delineate reservoirs of complex spatial architecture or geometries more accurately. Multiple-point geostatistics stochastic simulation is introduced to apply on delta reservoir modeling by taking 2Sa block in a certain oil field at BeiBuWan basin for example. At first, the training image of 2Sa block deposited in delta frontier of study area is established by digitizing sedimentary facies and then facies model of 2Sa block is created with the method of multiple-point geostatistics. The result indicates that facies model simulate the sedimentary microfacies space distribution as well as distribution law of sandbodies, which provides a guiding significance for predicting the distribution of effective sand-body in the study area.

Sedimentary Characteristics of Fuyu Oil Layer in the Southern Fuxin Uplift of Songliao Basin

2013 ◽  
Vol 868 ◽  
pp. 164-167
Author(s):  
Yong Qing Zhang ◽  
Shi Zhong Ma ◽  
Yu Sun ◽  
Jin Yan Zhang
Keyword(s):  
Continuous Distribution ◽  
Sedimentary Facies ◽  
Small Scale ◽  
Deformation Structure ◽  
Probability Curve ◽  
Narrow Strip ◽  
Sedimentary Characteristics ◽  
Sand Body ◽  
Delta System ◽  
Sand Bodies

Based on 22 well cores and logging data of nearly 800 well, sedimentary characteristics of Fuyu oil layer in the southern Fuxin uplift was analyzed. It is shown that types of sandstone in the Fuyu oil layer are main feldspathic litharenite, debris arkose and minor litharenite. Granularity probability curve is displayed as a typical of two-stage or three-stage. A large number of parallel bedding, one-way oblique bedding, small-scale cross bedding, the bottom scour structure and syngenetic deformation structure can be seen in the Fuyu oil layer. Mudstone color is main fuchsia, grey purple massive mudstone and gray-green, gray, dark gray massive mudstone. Combined with the analysis of the sedimentary facies sign, Fuyu oil layer in the southern Fuxin uplift is large fluvial-dominated shallow water delta deposition. The skeletal sand bodies in the delta system are distributary channelsand bodies that are large, dense, narrow strip, continuous distribution. The overall is south-southwest trending. Sand body is continuous and far underwater extension until it disappears into thin sandsheet. multi-branch fluvial-dominated ribbon-like bodies are formed.

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