Analysis on the well Constraint Inversion of the Jason-Based Layer Flattening Seismic Data under the High-Resolution Isochronous Framework

2013 ◽  
Vol 416-417 ◽  
pp. 1135-1141
Author(s):  
Shi Fang ◽  
Xin Rong Zhang ◽  
Jin Ping Liu ◽  
Chun Lai Xie
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
Oil And Gas ◽  
Absolute Error ◽  
Oil Field ◽  
Obvious Effect ◽  
Sand Body ◽  
The Absolute ◽  
Plane Distribution ◽  
Sand Bodies

The later-period structure of Fuyang oil layer is very complex, and its reservoir mainly consists of riverway sand bodies; the oil and gas reservoir is significantly concealed, so it is greatly difficult to identify. In order to accurately predict sand bodies by using seismic data, a well constrained inversion is made to the layer flattening seismic data using Jason software under the high-resolution sequence framework. Through a comprehensive analysis on seismic and geological data, the absolute error is within ±500, the relative error is within 10%; the predicted sand body plane distribution is reasonable, and the absolute error of 82% sand bodies is less than 10%. This proves that well constrained inversion for the Jason-based layer flattening seismic data under the high-resolution isochronous framework has an obvious effect on the areas of complex later-period structure, and thin and complex changed sand bodies. Therefore, it can meet the needs of the oil field exploration and development to a certain extent.

Research on Sedimentary Microfacies of Sandstone Group I in Putaohua Oil Reservoir of Gu83 Block in Gulong Oilfield

2013 ◽  
Vol 787 ◽  
pp. 618-621
Author(s):  
Yang Liu ◽  
Cheng Zhi Liu ◽  
Hui Li ◽  
Xiao Jing Liu ◽  
Yu Cong Li
Keyword(s):  
Seismic Data ◽  
Oil And Gas ◽  
Delta Front ◽  
Group I ◽  
Core Logging ◽  
Work Area ◽  
Sedimentary Microfacies ◽  
Plane Distribution ◽  
Drilling Core ◽  
Sand Bodies

The oil and gas reserves of Gu83 block in Gulong oilfield is very abundant, but the development is very difficult because the sand bodies are thin, scattered and lack of horizontal continuity. Guided by the theory of sequence stratigraphy and reservoir sedimentology, using drilling core, logging and seismic data, the researcher found that the interest area belongs to delta front subfacies deposition, which can be mainly classified by four miscrofacies types including underwater distributary channel, mouth, sheet sand and bay between distributary. The plane distribution of sedimentary microfacies are mainly controlled by the west and north provenance, the two source collected in the middle east of the work area.

Matlab and Geoscope Joint Inversion Technology under the Constraint of Isochronous Facies Controlled Multi-Point Geological Model

2013 ◽  
Vol 416-417 ◽  
pp. 1926-1934 ◽  
Author(s):  
Shi Fang ◽  
Xin Rong Zhang ◽  
Jun Li ◽  
Chun Lai Xie
Keyword(s):  
Statistical Model ◽  
Seismic Data ◽  
Oil And Gas ◽  
Joint Inversion ◽  
Oil Field ◽  
Space Distribution ◽  
Gas Reservoirs ◽  
Stochastic Inversion ◽  
Variation Function ◽  
Sand Bodies

The formation in Wudong area is complex, and oil and gas reservoirs are seriously concealed and very difficult to identify. Thus, to accurately predict the sand bodies by using seismic data, the facies controlled multi-point geological statistical model constrained inversion technology under the isochronous framework is applied. Through a comprehensive explanation on the seismic and geological data, the deposit facies space distribution in the study area is reveled, and then a very stable space variation function is solved in combination with the multi-point geological statistical model analyzed in the developed well. Seismic stochastic inversion constrained by the model is implemented, and its prediction accordance rate of the sand bodies reaches 87.5%, proving the facies controlled multi-point geological statistical model constrained inversion technology under the isochronous framework are only targeted at a few wells, and plays a very significant effect on the area of few wells, uneven distribution, and complex formation evolution. Thus, the model can meet the needs of the oil field exploration and development.

Study on the Application of the EPSTM Image Based Post-Stack Spectrum Imaging to the Identification of the Riverway Sand Bodies in Fuyang Oil Layer of Songliao Basin

2013 ◽  
Vol 443 ◽  
pp. 668-674
Author(s):  
Chun Rui Chen ◽  
Xin Rong Zhang ◽  
Jin Ping Liu ◽  
Shi Fang
Keyword(s):  
Relative Error ◽  
Oil And Gas ◽  
Statistical Error ◽  
Oil Field ◽  
Gas Reservoir ◽  
Sand Body ◽  
Spectrum Imaging ◽  
Anisotropic Reservoirs ◽  
Oil And Gas Reservoir ◽  
Sand Bodies

The later-period structure of Fuyang oil layer is complex and its reservoir is mostly composed by the sand bodies of riverways. The oil and gas reservoir features obvious concealment, and also is difficult to identify. To accurately describe the reservoir, a post-stack spectrum imaging was made for the identification of the riverway sand bodies in Fuyang oil layer using EPSTM image in the study area. The statistical error of the riverway sand body identification result using post-stack spectrum imaging was small if the sandstone thickness was greater than 3m. Seen from logging wells geological verification, the riverway identification fit rate was 81.6% on average, the microfacies type identification fit rate was 75%, and the microfacies types identification fit rate of the sandstone thicker than 3m was 80%. Using the nonlinear algorithm of the MDI software, the lithologic prediction was implemented based on the sand group as the unit, and the average prediction fit rate of the sandstone thicker than 3m reached 90% according to the standard relative error less than 20%. Therefore, the post-stack spectrum imaging can exert a significant effect for the anisotropic reservoirs of complex later-period structure, thin sand body, and complex changes, and can meet the needs of the oil field exploration and development to some extent.

High-resolution seismic processing technique with broadband,wide-azimuth, and high-density seismic data - A case study of thin-sand reservoir in eastern China

2021 ◽  
pp. 1-45
Author(s):  
Qin Su ◽  
Huahui Zeng ◽  
Yancan Tian ◽  
HaiLiang Li ◽  
Lei Lyu ◽  
...  
Keyword(s):  
Seismic Data ◽  
Oil And Gas ◽  
Single Point ◽  
Eastern China ◽  
High Density ◽  
Songliao Basin ◽  
Seismic Processing ◽  
Oil And Gas Exploration ◽  
Sand Body

Seismic processing and interpretation techniques provide important tools for the oil and gas exploration of the Songliao Basin in eastern China, which is dominated by terrestrial facies. In the Songliao Basin, a large number of thin-sand reservoirs are widely distributed, which are the primary targets of potential oil and gas exploration and exploitation. An important job of the exploration in the Songliao Basin is to accurately describe the distribution of these thin-sand belts and the sand-body shapes. However, the thickness of these thin-sand reservoirs are generally below the resolution of the conventional seismic processing. Most of the reservoirs are thin-interbeds of sand and mudstones with strong vertical and lateral variations. This makes it difficult to accurately predict the vertical and horizontal distribution of the thin-sand bodies using the conventional seismic processing and interpretation methods. Additionally, these lithologic traps are difficult to identify due to the complex controlling factor and distribution characteristics, and strong concealment. These challenges motivate us to improve the seismic data quality to help delineate the thin-sand reservoirs. In this paper, we use the broadband, wide-azimuth, and high-density integrated seismic exploration technique to help delineate the thin-reservoirs. We first use field single-point excitation and single-point receiver acquisition to obtain seismic data with wide frequency-bands, wide-azimuth angles, and high folds, which contain rich geological information. Next, we perform the near-surface Q-compensation, viscoelastic prestack time migration, seismic attributes, and seismic waveform indication inversion on the new acquired seismic data. The 3D case study indicates the benefits of improving the imaging of thin-sand body and the accuracy of inversion and reservoir characterization using the method in this paper.

scholarly journals The Celtic Sea banks: an example of sand body analysis from very high-resolution seismic data

1999 ◽  
Vol 158 (1-4) ◽  
pp. 89-109 ◽  
Author(s):  
T Marsset ◽  
B Tessier ◽  
J.-Y Reynaud ◽  
M De Batist ◽  
C Plagnol
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
Sand Body ◽  
Celtic Sea ◽  
Very High

Hydrocarbon identification using the AVO response correction method based on high-resolution complex spectral decomposition

2020 ◽  
Vol 8 (1) ◽  
pp. SA49-SA61
Author(s):  
Huihuang Tan ◽  
Donghong Zhou ◽  
Shengqiang Zhang ◽  
Zhijun Zhang ◽  
Xinyi Duan ◽  
...  
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
Spectral Decomposition ◽  
Oil And Gas ◽  
Low Frequency ◽  
Seismic Signal ◽  
Correction Method ◽  
Bohai Bay ◽  
Oil And Gas Exploration ◽  
Response Correction

Amplitude-variation-with-offset (AVO) technique is one of the primary quantitative hydrocarbon discrimination methods with prestack seismic data. However, the prestack seismic data are usually have low data quality, such as nonflat gathers and nonpreserved amplitude due to absorption, attenuation, and/or many other reasons, which usually lead to a wrong AVO response. The Neogene formations in the Huanghekou area of the Bohai Bay Basin are unconsolidated clastics with a high average porosity, and we find that the attenuation on seismic signal is very strong, which causes an inconsistency of AVO responses between seismic gathers and its corresponding synthetics. Our research results indicate that the synthetic AVO response can match the field seismic gathers in the low-frequency end, but not in the high-frequency components. Thus, we have developed an AVO response correction method based on high-resolution complex spectral decomposition and low-frequency constraint. This method can help to achieve a correct high-resolution AVO response. Its application in Bohai oil fields reveals that it is an efficient way to identify hydrocarbons in rocks, which provides an important technique for support in oil and gas exploration and production in this area.

scholarly journals Prediction of reservoir sand in Miocene deltaic deposits in Denmark based on high-resolution seismic data

2007 ◽  
Vol 13 ◽  
pp. 17-20 ◽  
Author(s):  
Erik S. Rasmussen ◽  
Thomas Vangkilde-Pedersen ◽  
Peter Scharling
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
Seismic Reflection ◽  
Oil And Gas ◽  
Lower Miocene ◽  
Sequence Stratigraphic ◽  
Deep Aquifers ◽  
Gas Bearing

Intense investigations of deep aquifers in Jylland, western Denmark, during the last seven years have resulted in de tailed mapping of Miocene sand-rich deposits laid down in fluvial channels, delta lobes, shoreface and spit complexes (Fig. 1; Rasmussen 2004). Detailed sedimentological and paly nol ogical studies of outcrops and cores, and interpretation of high-resolution seismic data, have resulted in a well-founded sequence-stratigraphic and lithostratigraphic scheme (Fig. 1) suitable for prediction of the distribution of sand. The Miocene succession onshore Denmark is divided into three sand-rich deltaic units: the Ribe and Bastrup sands and the Odderup Formation (Fig. 2). Prodeltaic clayey deposits of the Vejle Fjord and Arnum Formations interfinger with the sand-rich deposits. Most of the middle and upper Mio- cene in Denmark is composed of clayey sediments referred to the Hodde and Gram Formations (Fig. 2). This paper presents examples of seismic reflection patterns that have proved to correlate with sand-rich deposits from lower Miocene deltaic deposits and that could be applied in future exploration for aquifers and as analogues for oil- and gas-bearing sands in wave-dominated deltas.

Redefined Distribution of the Permian Volcanic Rocks in the Tarim Basin: Based on Logging and Seismic Data

2013 ◽  
Vol 448-453 ◽  
pp. 3723-3727 ◽  
Author(s):  
Yun Pan ◽  
Zong Xiu Wang ◽  
Mao Pan
Keyword(s):  
Tarim Basin ◽  
Seismic Data ◽  
Oil And Gas ◽  
Volcanic Rocks ◽  
Oil Field ◽  
Shielding Effect ◽  
Underlying Structure ◽  
Oil Exploration ◽  
Oil And Gas Exploration ◽  
The North

There are a lot of Permian volcanic rocks which are widely distributed in Tarim Basin. Because of the shielding effect of the volcanic rocks to the underlying structure, the distribution of the volcanic rocks in Tarim Basin is very important to the deep oil and gas exploration. However, with the progress of oil exploration in Tarim oil field in recent years, much more logging and seismic data is available. Based on the model of logging-seismic integrated identification, the distribution of the Permian volcanic rocks is revised by using the drilling, logging and seismic data. It shows that the rhyolite is mainly distributed in the north basin, and the basalt is widely distributed in the basin. Moreover, the basalt has larger area than which delineated by other people.

Sandbody Prediction by Frequency Spectrum Analysis in High-Resolution Sequence Framework of the Third Section of Qingshankou Formation, Xingxi Oil Field

2014 ◽  
Vol 522-524 ◽  
pp. 1284-1288
Author(s):  
Zhi Chao Wang ◽  
Hao Liu ◽  
Liang Zhang ◽  
Ying Li
Keyword(s):  
Quantitative Analysis ◽  
High Resolution ◽  
Spectrum Analysis ◽  
Spectral Decomposition ◽  
Oil Field ◽  
Decomposition Techniques ◽  
Frequency Spectrum Analysis ◽  
The Third ◽  
Sand Body ◽  
High Degree

The third section of Qingshankou formation can be divided into five subsequence groups in Xingxi oil field, including two in TST and three in HST. Using spectral decomposition techniques make it easy to predict the sand body decomposition. The sandstone lithology comparison on wells show a high degree of aggrement, indicating that the spectral decomposition techniques for the deposition of sand body prediction is a good way. However, this method can only play an important role in qualitative, not suitable for quantitative analysis.

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