Analysis on the heterogeneity of reservoir Chang 6 in D district of Ordos Basin

2021 ◽  
Author(s):  
Guilin Yang ◽  
Zhanli Ren
Keyword(s):  
Oil And Gas ◽  
Ordos Basin ◽  
Great Influence ◽  
Vertical Direction ◽  
Physical Property ◽  
Sedimentary Facies ◽  
Research Area ◽  
Control Factor ◽  
Research Areas ◽  
Sand Body

<p>This study is designed to evaluate the heterogeneity of the Chang 6 reservoirs in Study area, and to analyze the effect of heterogeneity on the distribution of oil. Mainly based on the sedimentary microfacies of the chang 6 reservoir, to calculate the mudstone by using the gamma curve in the logging curve, the separation layer and the interlayer were separated by 2 meters, then analyse the data of intercalation and interlayer by means of sedimentary facies, core and thin etc. We believe that the distribution of the sand in the plane and the heterogeneity of the reservoir is the main control factor of the oil distribution in the area, and it has a good area of oil, which own better properties, and the grain size more coarse; The main control factors of the Chang 6 reservoir in D area is the distribution and physical property of the sand body plane, the better the continuity and physical property of the sand body plane, and the better display of the oil-bearing property of the reservoir; The migration will occur in the vertical direction When the oil and gas meet the thinner interlayer, which will have a great influence on the distribution of oil and gas in the vertical direction; The full extent of oil and gas in the reservoir is controlled by the microscopic heterogeneity of the reservoir. In the study area, the reservoir heterogeneity influence the oil and gas distribution by the physical and lithologic characteristics, the distribution of sand body surface and the distribution of layer interval etc mainly. The study on the relationship between the heterogeneity and reservoir distribution of the Chang 6 reservoirs in the research area can be reasonably evaluated for the favorable areas of oil and gas reservoirs and prediction research areas, so as to guide the development of rational development plans in the next step.</p>

The Structural Characteristics and Distribution of Sand Body of the Layer 7 of YanChang Formation in Ordos Basin

2014 ◽  
Vol 628 ◽  
pp. 360-365
Author(s):  
Qi Qi Lv ◽  
Shun She Luo ◽  
Lin Jing Li ◽  
Rong Dai ◽  
Yu Dong Li
Keyword(s):  
Depositional Environment ◽  
Structural Characteristics ◽  
Ordos Basin ◽  
Sedimentary Facies ◽  
Research Area ◽  
Uniform Thickness ◽  
Yanchang Formation ◽  
Genetic Types ◽  
Sand Body ◽  
Pelvic Shape

The tight sand in the layer 7 of YanChang Formation, Ordos Basin major develops braided river delta and gravity flow deposits. In this paper, based on previous studies on lake pelvic shape, provenance and hydrodynamic, the sand body in the research area has been systematically studied through core observation, logging data, and sedimentary theory. Various genetic types of sedimentary sand body are developed in this area, mainly as delta deposition, sandy debris flow deposits, turbidites (classic turbidites). We can identify 6 kinds of sand vertical combination type, they are the superimposed sand body (A-type), thick and uniform thickness sand body (B type), thin and uniform thickness sand body (C-type), up thinning sand body (D-type), thickening up sand body (E-type) , thick and thin interbed sand body (F-type). The 6 types mainly controlled by sedimentary facies. The A-type sand body mainly developed in the delta depositional environment, the B type sand body is visible both in the delta and slope belt, while the D-type, E-type, F-type sand body are mainly developed in the deep lake. The distribution of sand body in the plane is zonal pattern.

Predict Channel Sand Body Distribution Characteristics of South Eighth District Based on RMS Amplitude Attributes & Frequency Division

2013 ◽  
Vol 734-737 ◽  
pp. 404-407 ◽  
Author(s):  
Yu Shuang Hu ◽  
Si Miao Zhu
Keyword(s):  
Seismic Data ◽  
Physical Property ◽  
Sedimentary Facies ◽  
Distribution Area ◽  
Frequency Division ◽  
Root Mean Square Amplitude ◽  
Seismic Attribute ◽  
Body Distribution ◽  
Attribute Analysis ◽  
Sand Body

A big tendency in oil industry is underestimating the heterogeneity of the reservoir and overestimating the connectivity, which results in overly optimistic estimates of the capacity. With the development of seismic attributes, we could pick up hidden reservoir lithology and physical property information from the actual seismic data, strengthen seismic data application in actual work, to ensure the objectivity of the results. In this paper, the channel sand body distribution in south eighth district of oilfield Saertu is predicted through seismic data root-mean-square amplitude and frequency division to identify sand body boundaries, predict the distribution area channel sand body characteristics successfully, which consistent with the sedimentary facies distribution. The result proves that seismic attribute analysis has good practicability in channel sand body prediction and sedimentary facies description.

Research on Types of Oil Reservoirs and Character of Oil-Water Distribution in Heidimiao Layer

2013 ◽  
Vol 772 ◽  
pp. 789-794
Author(s):  
Gui You Lv
Keyword(s):  
Water Distribution ◽  
Oil And Gas ◽  
Dominant Role ◽  
Three Dimensional ◽  
Physical Property ◽  
Research Area ◽  
Oil Reservoir ◽  
Well Testing ◽  
Testing Data ◽  
Oil Water

This paper takes Yingtai area which is located in the south of Qijia-Gulong sag and part of central sag area in the north of the Songliao Basin as the research area. Then combining all information of core, logging, three-dimensional seism and well testing data, it studies the reservoir type and oil-water distribution characteristics of Heidimiao by analyzing the comparison charts of sandstone, profile map of reservoir, T07 structure diagram, well testing data, stratum thickness, sandstone thickness, ratio of sandstone thickness to stratum thickness, porosity values, permeability contour maps. The reservoir lithology of Heidimiao oil layer is siltstone-oriented with poor physical property. The main controlling factor of oil-water distribution is the lithology, followed by the structure. Heidimiao oil layer mainly includes three types, lithological oil reservoir, lithological - structural oil reservoir and structural oil reservoir, among which lithological reservoir plays a dominant role. Its oil-water distribution is characterized by the pattern of upper-water and bottom-oil; when the fault acts as the pathway for the longitudinal migration of oil and gas, the pattern changes to the upper-oil and bottom-water. This research could provide reliable geological basis for the research of old well re-examination, favorable area evaluation and horizontal well drilling design.

scholarly journals Study on Fracability of Tight Reservoir on the basis of Geophysical Logging: a Case Study of Chang 7 Formation in Longdong Area, Ordos Basin

CONVERTER ◽  
2021 ◽  
pp. 518-527
Author(s):  
Zhenhua Li, Et al.
Keyword(s):  
Fracture Toughness ◽  
Oil And Gas ◽  
Thermal Evolution ◽  
Ordos Basin ◽  
Laboratory Data ◽  
Physical Property ◽  
Field Application ◽  
Analysis Model ◽  
Form Complex ◽  
Tight Reservoir

Fracability is the ability to form complex fracture to Increase production in tight reservoir under the same fracturing condition. The factors influencing fracturing include reservoir brittleness, fracture toughness, crack system,thermal evolution andmineral content etc. The tight reservoir physical property are poor, and the oil and gas produced under natural conditions is too little, so it is necessary to fracture the reservoir.In this paper, the brittleness and fracture toughness of Chang 7 Formationof Ordos Basinare calculated by logging data under the constraint of laboratory data. In combination with production practice, a new analysis model of reservoir hydraulicfracturing is constructed. The new analysis method is used to evaluate the fracability of Chang 7 stratum in the Ordos Basin, which ranges from 38.7% to 51.4%. It is basically consistent with the practical fracturing effect of typical wells in this area, which shows that the new method is accurate in calculation, convenient in field application, and can provide experience for the reservoir hydraulic fracturing .

Ultra Low Permeability Reservoir Characteristics and Origin Analysis

2011 ◽  
Vol 361-363 ◽  
pp. 51-54
Author(s):  
Hong Yan Yu ◽  
Hong Qi Li
Keyword(s):  
Large Scale ◽  
Ordos Basin ◽  
Physical Property ◽  
Research Area ◽  
Low Permeability ◽  
Storage Space ◽  
Low Permeability Reservoir ◽  
Microscopic Feature ◽  
Depositional Setting ◽  
High Range

As the result of its special structural feature and depositional setting, Ordos Basin formed large scale low-permeability reservoir. According to scanning electron microscope, casting sheet image, core observation, physical property analysis and core analysis testing, this paper summarized and analyzed ultra low permeability reservoir microscopic feature of Ordos Basin Baibao area Chang63. Reservoir microscopic feature is controlled by deposition and diagenesis. Deposition decided reservoir lithology, interstitial content and sizes of primary pores. Compaction and cementation of diagenesis destroyed primary pores, but denudation provided high range secondary pores, which improved storage space of the research area.

Study on the composition and inter-layer correlation of coalbed methane system of Xishanyao Formation under sedimentary control, Southern Junggar Basin, NW

2020 ◽  
Author(s):  
aobo zhang ◽  
shuling Tang
Keyword(s):  
Coalbed Methane ◽  
Junggar Basin ◽  
Sedimentary Facies ◽  
Research Area ◽  
Gas Content ◽  
Sand Body ◽  
Diversion Channel ◽  
Plane Distribution ◽  
Crevasse Splay ◽  
Lacustrine Facies

<p>In order to investigate the controlling of the sedimentation environment evolution on the coalbed methane system in Xishanyao Formation on the southern margin of Junggar Basin，using drilling wells，logging wells，outcrops and other data with the assistance of fine analysis methods，such as scanning electron microscope and image granularity，the coalbed methane system was divided，and its sedimentation evolution process was researched． The research results show that sand body of five types of sedimentation microfacies，whose water and air blocking capacity is sorted as “diversion channel＜crevasse splay and beach dam＜natural levee and shore－shallow lake”，can be identified in the research area，and single－well vertical coalbed methane system was divided; during the SQ1—SQ2 period，the rise of lake level led to the expansion of the development area of lacustrine facies，as well as the weakening of the coal－accumulating process which was mainly concentrated in the TST and LST stages of SQ1，and the east－west characteristic difference regarding the coalbed development and gas content appeared and was in accordance with the plane distribution of sedimentary facies; during exploitation，the coalbed methane system should be defined according to the blocking capability of surrounding rock，appropriate exploitation methods should be selected according to the characteristics of each system，and the avoidance of vertically joint－developing sandstone aquifer and combined layer series of development should be paid attention to．</p>

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 Three-Dimension Sedimentary Facies Model Building of the Reservoir Chang2 Member, Yanchang Formation in Zhifang Area, Erdos Basin

2012 ◽  
Vol 466-467 ◽  
pp. 303-307 ◽  
Author(s):  
Kun Sheng Qiang ◽  
Jian Min Wang ◽  
Xin Wen Tian ◽  
Xiu Xiang Lü ◽  
Lei Tian
Keyword(s):  
Oil And Gas ◽  
Model Building ◽  
Ordos Basin ◽  
Sedimentary Facies ◽  
Distribution Model ◽  
Small Rivers ◽  
Clear Understanding ◽  
Three Dimension ◽  
Yanchang Formation ◽  
Facies Model

Through the Ordos basin sample with Triassic Yanchang formation Chang 2 member sedimentary facies research and analysis, the use of deterministic modeling and the theory of stochastic modeling, using PETREL software, the establishment of a three-dimensional visualization of the study area Chang 2 member geological reservoir facies model, the model and geological interpretation in the whole match, a true reflection of the sedimentary characteristics of the study area, the numerical simulation for the latter part of remaining oil and provide a geological basis. Sand distribution model based on a clear understanding of sand microfacies characteristics distribution in the plane and space, the combination of relations, proved in the study area is mainly sand flat on the NE - SW band distribution, the distributary channel facies under control the trend of the sand body, in the same succession of small rivers within the good level, migration is not swinging, with micro-facies stability.Chang2 member channel development , is the favorable oil and gas accumulation zones.

Overview and initial results of the National Center for Health Statistics’ Research and Development Survey1

2020 ◽  
Vol 36 (4) ◽  
pp. 1199-1211
Author(s):  
Jennifer Parker ◽  
Kristen Miller ◽  
Yulei He ◽  
Paul Scanlon ◽  
Bill Cai ◽  
...  
Keyword(s):  
Survey Data ◽  
Evaluation Studies ◽  
Research Area ◽  
Production Cycle ◽  
Response Patterns ◽  
Health Statistics ◽  
Mode Effects ◽  
Research Areas ◽  
Statistical Agencies ◽  
Initial Results

The National Center for Health Statistics is assessing the usefulness of recruited web panels in multiple research areas. One research area examines the use of close-ended probe questions and split-panel experiments for evaluating question-response patterns. Another research area is the development of statistical methodology to leverage the strength of national survey data to evaluate, and possibly improve, health estimates from recruited panels. Recruited web panels, with their lower cost and faster production cycle, in combination with established population health surveys, may be useful for some purposes for statistical agencies. Our initial results indicate that web survey data from a recruited panel can be used for question evaluation studies without affecting other survey content. However, the success of these data to provide estimates that align with those from large national surveys will depend on many factors, including further understanding of design features of the recruited panel (e.g. coverage and mode effects), the statistical methods and covariates used to obtain the original and adjusted weights, and the health outcomes of interest.

KORESPONDENSI BUNYI BAHASA LAMPUNG DIALEK TULANGBAWANG

2017 ◽  
Vol 6 (1) ◽  
pp. 91
Author(s):  
Roveneldo Roveneldo
Keyword(s):  
Research Area ◽  
Research Areas ◽  
Data Collecting ◽  
Morphological Differences

This research discusses the differences of vowel correspondences, vowel, and  consonant variations of Tulangbawang dialect of Lampung language in six research areas. The data collecting technique was conducted by applying  dialectology method. Moreover, this research used the list of questions  that  listed in Swadesh’s basic vocabularies. The result showed that there are  differences in the linguistic elements in Lampung language which include  the  differences in phonology, morphology, and lexicon. In the phonological differences, it was found that there are one vowel correspondence, eleven vowel variations, and twenty three consonant variations. In general, vowel correspondence lies in the end of words, and the tendency of occurring is found  in the research area 1, 3, 4, and 5. All research areas always have similarities  but there are various changes for each correspondence in research area number  six. In the morphological differences, there are differences in the form of suffixes namely correspondences. Besides, there are some lexical differences found in the six research areas.Abstrak Penelitian ini membahas perbedaan korespondensi vokal, variasi vokal, dan variasi konsonan dalam bahasa Lampung dialek Tulangbawang di 6 titik pengamatan. Pengambilan data dilakukan dengan menggunakan metode dialektologi. Selain itu, penelitian ini menggunakan daftar pertanyaan yang digunakan pada 200 kosakata dasar swadesh. Ditemukan perbedaan unsur-unsur kebahasaan dalam bahasa Lampung yang meliputi perbedaan; fonologi, morfologi, dan leksikon. Perbedaan fonologi ditemukan satu korespondensi vokal, sebelas variasi vokal, dan dua puluh tiga variasi konsonan. Umumnya korespondensi vokal posisi akhir kata, ada kecendrungan pada daerah titik pengamatan 1, 3, 4, dan 5. Kesemua itu selalu memiliki kesamaan walaupun pada enam daerah titik pengamatan memiliki perubahan yang berbeda-beda untuk setiap korespondensi yang ditemukan. Dalam perbedaan morfologi terdapat perbedaan bentuk sufiks yang berupa korespondensi. Selain itu, perbedaan leksikon cukup banyak ditemukan pada enam titik daerah pengamatan.

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