Remaining Oil Distribution and Development of Chao64 Block in Chaoyanggou Oilfield

2014 ◽  
Vol 522-524 ◽  
pp. 1262-1265
Author(s):  
Qi Xu
Keyword(s):  
High Water ◽  
High Position ◽  
Control Factors ◽  
Oil Distribution ◽  
Body Development ◽  
Sand Body ◽  
Remaining Oil ◽  
High Water Cut ◽  
Water Cut ◽  
High Structure

Effective comprehensive logging, seismic fine prediction of structure and sand body, analysis of remaining oil controlling factors and distribution, is the precondition for remaining oil development in high water cut oilfield during the middle and later periods of the development. Based on combination of fine well and seismic fine structure and sand body prediction research, this article analyzes main control factors and distribution regularity of remaining oil in the block. Through the analysis, the structure and reservoir heterogeneity affected the distribution of remaining oil in the Fuyu oil layer in the Chao 64 block, the distribution of remaining oil in the plane, interlayer and layer showed different distribution characteristic. The remaining oil mainly distributed in the reverse faulting footwall high structure position, injection production faultiness part, and micro range structural high position, inter well isolated sand body development area.

Study on 3D Fine Structural Modeling of Typical Block in Sanan Oilfield, Daqing

2014 ◽  
Vol 628 ◽  
pp. 348-353
Author(s):  
Tao Li ◽  
Zian Li ◽  
Jiang Wang
Keyword(s):  
Structural Model ◽  
3D Structure ◽  
High Water ◽  
Oil Distribution ◽  
Remaining Oil ◽  
Modeling Software ◽  
Remaining Oil Distribution ◽  
High Water Cut ◽  
Reservoir Description ◽  
Water Cut

Sanan oilfield has entered late stage of high water cut development. It urgently needs accurate prediction of remaining oil distribution. But previous studies on 3D structure were far could not meet the requirements of fine reservoir description. This paper applied RMS, a piece of excellent geological modeling software establishing the 3D fine structural model of typical block in Sanan oilfield on the bases of 3D fine seismic structural interpretation data. It included the 28 faults’ model, 11 horizons’ model and the structural model. And then measured and analyzed the faults elements data. Based on abundant geologic data, well data and seismic data of the block, this structural model reproduced the fine seismic interpretation results accurately. It was really fine enough to meet the requirements of the fine reservoir description. This research solved the problem that traditional modeling techniques could not handle complex cutting relationship of faults’ model. It laid a solid foundation for reservoir numerical simulation and remaining oil distribution prediction.

scholarly journals Microscopic Determination of Remaining Oil Distribution in Sandstones With Different Permeability Scales Using Computed Tomography Scanning

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Yongfei Yang ◽  
Haiyuan Yang ◽  
Liu Tao ◽  
Jun Yao ◽  
Wendong Wang ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Oil Recovery ◽  
Distribution Patterns ◽  
High Water ◽  
Water Flooding ◽  
Oil Distribution ◽  
Computed Tomography Scanning ◽  
Remaining Oil ◽  
High Water Cut ◽  
Water Cut

To investigate the characteristics of oil distribution in porous media systems during a high water cut stage, sandstones with different permeability scales of 53.63 × 10−3 μm2 and 108.11 × 10−3 μm2 were imaged under a resolution of 4.12 μm during a water flooding process using X-ray tomography. Based on the cluster-size distribution of oil segmented from the tomography images and through classification using the shape factor and Euler number, the transformation of the oil distribution pattern in different injection stages was studied for samples with different pore structures. In general, the distribution patterns of an oil cluster continuously change during water injection. Large connected oil clusters break off into smaller segments. The sandstone with a higher permeability (108.11 × 10−3 μm2) shows the larger change in distribution pattern, and the remaining oil is trapped in the pores with a radius of approximately 7–12 μm. Meanwhile, some disconnected clusters merge together and lead to a re-connection during the high water cut period. However, the pore structure becomes compact and complex, the residual nonwetting phase becomes static and is difficult to move; and thus, all distribution patterns coexist during the entire displacement process and mainly distribute in pores with a radius of 8–12 μm. For the pore-scale entrapment characteristics of the oil phase during a high water cut period, different enhance oil recovery (EOR) methods should be considered in sandstones correspondent to each permeability scale.

The Analysis of Remaining Oil in High Water Cut Stage

2013 ◽  
Vol 274 ◽  
pp. 675-678
Author(s):  
Cheng Fu ◽  
Bin Huang
Keyword(s):  
Characteristic Curve ◽  
Material Balance ◽  
High Water ◽  
Oil Distribution ◽  
Remaining Oil ◽  
Remaining Oil Distribution ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut ◽  
Material Balance Method

The remaining oil distribution is very complex and the difficulty in tapping measures is more and more big when the west block of South-eight area has gone into the ultra-high water cut stage. So the remaining oil distribution in 109 units has been comprehensively studied on the condition that the composite water cut reaches 9.06% by establishing reservoir geologic model and proceeding reservoir numerical simulation according to recent tapping measures and remaining oil analysis experience in the process of adjusting scheme. And combined with some reservoir engineering methods such as: waterflooding characteristic curve and material balance method, obvious effects has been obtained in this research.

The Application of Identification of Fault by Well-Seismic Comprehensive Method - Taking Xingbei Oilfield as Example

2014 ◽  
Vol 962-965 ◽  
pp. 494-499
Author(s):  
Shuang Bing Lv
Keyword(s):  
Fault Location ◽  
3D Visualization ◽  
Great Influence ◽  
High Water ◽  
Fault Classification ◽  
Seismic Section ◽  
Sand Body ◽  
Remaining Oil ◽  
High Water Cut ◽  
Water Cut

For small faults have great influence on remaining oil distribution and injection-production relation in the latter period of high water-cut oilfield, an accurate distribution of these minor faults is one of the main control factors of injection-production adjustment. So, the little fault location predication accurately is necessary. But, research that only rely on logging data description of fault and reservoir characteristics have certain limitation, especially in the fault-points, crosswell faults combination and extension length, plane position and continuity between wells sand body, etc. The seismic forward modeling analysis, 3D visualization, various fault classification identification describe integration technology was used, and the fine structure interpretation method was formed, which integrated technology of the first big to small, first simple to complex, slice confirm fault strike, seismic section ensure fault dip, common fixed fault attitude. Fault The remaining potential of fault nearby, crosswell sand body and enlarge transitional are developed by reunderstanding reservoir which was studied in well-seismic interpretation technology. It’s important to improve the fine remaining oil descriptiont for further increaseing understanding of reservoir and of high water-cut old oilfields.

A Fuzzy Method to Evaluate Remaining Oil Potentiality of PI Group

2013 ◽  
Vol 734-737 ◽  
pp. 1131-1134
Author(s):  
Jian Zhong Liu ◽  
Jin Cheng Xu
Keyword(s):  
Fuzzy Theory ◽  
Water Injection ◽  
Influence Factors ◽  
Sedimentary Facies ◽  
High Water ◽  
Potential Measurement ◽  
Oil Distribution ◽  
Remaining Oil ◽  
High Water Cut ◽  
Water Cut

The remaining oil distribution and its potential evaluation are the keys to the well network adjustments and comprehensive potential exploration on the later stage production. In view of the vagueness of the influence factors of remaining oil potentiality, a set of quantitative evaluate method about how to suit remaining oil potentiality of heavy oil reservoir at high water-cut stage is established. Six factors are taken into consideration, including oil saturation, reservoir thickness, permeability, porosity, water injection distance and sedimentary facies. First, make sure the evaluate criterion and the influence weight of a single effect factor. And then, use the fuzzy theory to calculate the latent capacity of the block, comprehending many factors. In the end, certain the foundation of remaining oil potentialities according to the value of the latent capacity. Using this method, remaining oil potentiality of the east of Beierxi is calculated at high water cut period. This provides a theoretical guide to formulation and implementation of the in-situ potential measurement.

The Application of Multistage Fuzzy Comprehensive Evaluation Mathematics Method for the Analysis of Determining the Remaining Oil in Ultra-High Water-Cut Oilfield

2014 ◽  
Vol 926-930 ◽  
pp. 4429-4432 ◽  
Author(s):  
Chun Mei You ◽  
Jia Chun Wang ◽  
Xiao Jun Sun ◽  
Xian Hu Lv ◽  
Shao Ming Song
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
High Water ◽  
Water Flooding ◽  
Oil Distribution ◽  
Remaining Oil ◽  
High Water Cut ◽  
Water Cut ◽  
Mathematics Method

After the water flooding sandstone oilfield entering the ultra-high water-cut developing phase, the remaining oil distribution has become increasingly fragmented, how to quantitative distinguish the remaining oil potential is the key to influence oilfield development, using multilevel fuzzy comprehensive evaluation mathematics method, comprehensive analyzed the classification reservoir’s producing conditions during the ultra-high water-cut developing phase, established a quantitative evaluation method from geological and develop factors, solved the problem of analyzing remaining oil in deferent kinds of reservoirs, realized the quantitative characterization of remaining oil in the ultra-high water-cut oilfield.

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