Chinese Academy of Sciences

Institute of Geology and Geophysics, Cas

Rixiang Zhu

Wang Zhang

Yaping Wang

Xiongqi Pang

Wenyang Wang

Zhangxing Chen

Tao Hu

Wei Lu

Yan Zhang

Shengwen Qi

Bowen Zheng

Songfeng Guo

Haijun Zhao

Yongchao Li

Xiaokun Hou

Tianming Huang

Lei Fu

Zan Wang

Zhendong Cui

Lina Ma

Bo Wan

Yanlong Kong

Shujuan Kang

Pingchuan Dong

A compact rock pyrolytic analysis and evaluation instrument comprises a sample introduction system, a pyrolytic furnace, a bypass system, a total hydrocarbon amount and methane content analysis system, a signal acquisition control system and a computer. The pyrolytic furnace is respectively connected with the sample introduction system and the bypass system, the total hydrocarbon amount and methane content analysis system is connected with the bypass system, the signal acquisition control system is used for controlling and connecting the total hydrocarbon amount and methane content analysis system, and meanwhile, the signal acquisition control system is communicated with the computer. The disclosure simultaneously detects the total amount of hydrocarbons produced by rock pyrolysis and the content of methane gas produced by rock pyrolysis, and the obtained data are reliable.

Compact rock pyrolytic analysis and evaluation instrument

The present disclosure provides a multi-scale three-dimensional (3D) engineering geological model construction system and method. A regional geological model of a target region, a site geological model of each engineering site, and a drilling geological model of each drilling well are constructed. The geological model of each drilling well is superimposed to the site geological model of the corresponding engineering site in the way of step-by-step superimposition, and the site geological model of each engineering site fused with the drilling geological model is superimposed to the regional geological model of the target region. Thus, multi-scale geological model fusion of drilling well, engineering site, and regional mountain is realized. The final multi-scale 3D engineering geological fusion model can provide multi-scale refined geological information for geological suitability evaluation of major geological engineering, so as to ensure accuracy of geological suitability evaluation and site selection of major geological engineering.

Multi-scale three-dimensional (3D) engineering geological model construction system and method

A method, system and device for comprehensively characterizing a lower limit of oil accumulation of a deep marine carbonate reservoir is provided, aiming to solve the problem that the prior art cannot: accurately determine the lower limit of oil accumulation of the deep marine carbonate reservoir, which leads to the difficulty in predicting and identifying deep effective reservoirs. The method includes: determining lower limit porosity and permeability for oil accumulation based on a boundary line; determining lower limit porosity and permeability for oil accumulation based on a movable oil ratio of a core sample; determining a lower limit pore throat radius for oil accumulation based on a mercury injection experiment; and comprehensively characterizing the lower limit of oil accumulation of a deep marine carbonate reservoir to be predicted. The method, system and device can predict and identify deep effective reservoirs.

Method for comprehensively characterizing lower limit of oil accumulation of deep marine carbonate reservoir

An evaluation method for residual hydrocarbon of post- to over-mature marine source rocks includes the following steps: establishing a hydrocarbon generation potential evolution profile and a hydrogen index evolution profile of post- to over-mature source rocks; determining a critical condition for hydrocarbon expulsion of the source rocks, and inverting original hydrocarbon generation potential of the source rocks; inverting a critical condition for hydrocarbon generation of the source rocks; establishing a hydrocarbon generation, expulsion and retention model for the source rocks; determining a hydrocarbon generation rate, a hydrocarbon expulsion rate and a hydrocarbon retention rate of the source rocks; and calculating a hydrocarbon retention intensity and residual hydrocarbon of the source rocks. The evaluation method establishes an evaluation model for residual hydrocarbon of post- to over-mature source rocks without relying on immature to sub-mature samples.

Evaluation method for residual hydrocarbon of post- to over-mature marine source rocks

A method, system and device for predicting an oil accumulation depth limit of deep and ultra-deep marine carbonate reservoirs is provided. The method includes: obtaining geological factors acting on a porosity of a deep/ultra-deep marine carbonate reservoir, standardizing absolute values of the geological factors; calculating a porosity of the deep/ultra-deep marine carbonate reservoir; acquiring ratios of oil, water and dry layers in each M % porosity interval, and acquiring a relationship between a dry layer ratio and the porosity of the deep/ultra-deep marine carbonate reservoir; recursively obtaining a relationship between the dry layer ratio and the burial depth and determining the oil accumulation depth limit of the deep/ultra-deep marine carbonate reservoir. The method, system and device solves the problem that the prior art cannot by predicting the oil accumulation depth limit directly through the relationship between the dry layer ratio and the depth.

Method for predicting oil accumulation depth limit of deep and ultra-deep marine carbonate reservoirs

Growing community of inventors

Beijing, China

Rixiang Zhu