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The techniques of reservoir prediction domestic and international mainly involve seismic inversion, seismic attribute analysis, fracture and fluid detection, etc. The general trend of development in reservoir prediction is to make full use of the latest achievements from each discipline, exert the multidisciplinary advantages to a higher level, minimize nonuniqueness of reservoir prediction, combine pre-stack and post-stack seismic data, expert optimization and automatic technology together, apply approaches as many as possible for integrated prediction of reservoirs.

 

Seismic inversion is a commonly used method of reservoir prediction, and it can be categorized into pre-stack inversion and post-stack inversion. Currently, post-stack inversion plays the main role, characterized by high speed, stability, but relatively low resolution. Meanwhile, pre-stack is characterized by high resolution, but low speed, poor stability. The method of mixing pre-stack with post-stack inversion that take advantages of high resolution of pre-stack inversion and high speed and good stability of post-stack where the disadvantages of both are eliminated becomes the focus of attraction. The prospect of application is vast, especially for the case of deep sea without wells.
 
Seismic attribute technology has a long history and comparatively mature in petroleum exploration. In 1970s and 1980s, among seismic attribute technologies the most popular one is amplitude-based instantaneous attribute. The spectral decomposition which has developed in recent years offers a method of semi-quantitative imaging and mapping for geologic body thickness and geologic discontinuity in 3D exploration area. This technology has been applied in the description of sedimentary facies and sedimentary environment, such as organic reef, oolitic shoal limestone reef flat, etc.

 
In the aspect of reservoir fracture prediction, since 1970s the most attention has been paid to reservoir fracture study in the countries represented by former Soviet Union and U.S., the most cases of which are interpretations of fracture growth by the well logging, including the following: (1) outcrop area investigation and core observation; (2) core laboratory analysis method; (3) various well logging methods such as FMI; (4) paleotectonic stress field numerical simulation method; (5) well testing and other dynamic approach; (6) well logging and other seismic methods, which have been applied to determining the fracture zone and anisotropism. Especially in recent years, there’s extraordinary improvement in seismic anisotropy from theory research, laboratory testing to practical application research.
 
Fluid detection technology are the methods to find directly oil/gas reservoirs by extracting features from seismic reflection (and refraction) data, including bright point technique, AVO technique, multi-waves and multi-components technique, seismic inversion, fracture prediction and attribute calculation, etc. The simplest and most effective methods are bright point technique and direct calculation of fluid attenuation attribute.

Reservoir research software of LandOcean covers all the aspects above. With its leading-edge and usefulness, it stands the proof by practical application, and is recognized extensively by the industry.
 
 
Examples:
 
Figure 1 Section of fluid attenuation gradient
 
 
Figure 2 Hydrocarbon detecting section of multi-attribute systhesis
 
 
 
 
 
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