Particle diameter and rock property well-logging evaluation method under restraint of depositional microfacies
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A technology of sedimentary microfacies and evaluation methods, which can be used in measurement devices, earthwork drilling, particle size analysis, etc., and can solve problems such as the inability to meet the needs of exploration and development
Active Publication Date: 2019-10-11
CHINA UNIV OF PETROLEUM (EAST CHINA)
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In view of the needs of thick, low-permeability-tight sandstone reservoir heterogeneity and reservoir fine geological model research, the existing technology cannot meet the current needs of low-permeability-tight sandstone reservoir exploration and development
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Embodiment 1
[0032] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, a particle size lithology logging evaluation method under the constraints of sedimentary microfacies belongs to the research field of reservoir logging evaluation, and provides technical support for the evaluation of low-permeability-tight reservoir heterogeneity and reservoir "sweet spot".
[0033] A particle size lithology logging evaluation method under the constraints of sedimentary microfacies, mainly including the following steps:
[0034] Step 1), collecting and arranging mud logging, well logging and analysis and testing data, and determining the vertical distribution of different sedimentary microfacies based on core observation and logging curves;
[0035] Step 2), according to the mud logging data-logging curve, the sandstone part and the mudstone part are split, and the lithology is identified...
Embodiment 2
[0089] Embodiment 2: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, a particle size lithology logging evaluation method under the constraints of sedimentary microfacies, based on the mudstone and rock physics model split by mud logging data-logging in the sedimentary microfacies logging evaluation unit to identify different particle size lithology, will The mudstone from the mud logging data and the lithology of different particle sizes evaluated in the logging evaluation unit are combined to evaluate the vertical distribution of different particle size lithologies on a single well, providing a kind of particle size lithology measurement under the constraints of sedimentary microfacies. Well evaluation process (eg figure 1 shown), including the following steps:
[0090] (1) Collect mud logging data, well logging data and analysis and test data of target intervals in the ...
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Abstract
The invention discloses a particle diameter and rock property well-logging evaluation method under restraint of depositional microfacies, and belongs to the technical field of reservoir well-logging evaluation research. The particle diameter and rock property well-logging evaluation method is characterized in that mudstones are split through a well-logging data-well-logging curve, well-logging recognition on five particle diameter and rock property disclosed thick layers of coarse sandstones, sandy conglomerate, medium sandstones, fine sandstones and siltstones is performed in rock physical model-depositional microfacies well-logging evaluation units to determine heterogeneity of a low-permeability and compact sandstone reservoir; the rock physical model-depositional microfacies well-logging evaluation units are divided out from geologic origin, and innovation is obtained from well-logging recognition on thick layers and the rock property of low-permeability and compact sandstone reservoir; and well-logging data, well-logging information and analysis test data are integrated, so that mudstones split by the well-logging data-well-logging curve and different particle diameters and rock property recognized in the rock physical model-depositional microfacies well-logging evaluation units are combined to form the evaluation method.
Description
technical field [0001] The invention relates to a particle size lithology logging evaluation method under sedimentary microfacies constraints, and belongs to the technical field of reservoir logging evaluation research. Background technique [0002] The complexity of the lithology of low-permeability-tight sandstone reservoirs makes it difficult to develop. The root cause of the heterogeneity of low-permeability-tight sandstone reservoirs is the complex geological origin. On the one hand, the original sedimentary material basis was obtained during the depositional period; on the other hand, the impact of diagenesis on the quality of the reservoir during the diagenetic history. Therefore, it is very necessary to study the heterogeneity of low-permeability-tight sandstone reservoirs, and identifying lithology by logging is one of the important tasks of reservoir evaluation, which is of great value to the research of reservoir heterogeneity. [0003] There are many methods for...
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