Abstract: An evaluation method for hydrocarbon expulsion of post- to over-mature marine source rocks includes: establishing a hydrocarbon expulsion evolution profile of post- to over-mature source rocks; determining a critical condition for hydrocarbon expulsion from the source rocks, inverting original hydrocarbon generation potential of the source rocks, and establishing a hydrocarbon expulsion model for the source rocks; determining a hydrocarbon expulsion rate and cumulative hydrocarbon expulsion of the source rocks; and calculating hydrocarbon expulsion of the source rocks. The evaluation method establishes a hydrocarbon expulsion model for post- to over-mature source rocks without relying on immature to sub-mature samples. The evaluation method provides a scientific basis for the evaluation of the potential of deep oil and gas resources, and provides strong theoretical guidance and technical support for deep oil and gas exploration.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Techniques in horizontal well completions that facilitate multistage fracturing may be performed in shale gas reservoirs. The techniques may involve the creation of large scale fracture networks, connecting the reservoir and the wellbore, facilitated by activating pre-existing natural fractures (NFs). In addition, geo-mechanical characteristics facilitate the optimization of maximum stimulated reservoir volumes (SRVs). In particular, completion optimization patterns are provided for horizontal wellbores, designated herein as altered alternate fracturing (AAF) completions. Completion optimization patterns may involve a multi-step combination of simultaneous and alternate fracturing patterns. Additionally, the dynamic evolution and progression of NF growth are modeled using a variety of alternative criteria. Further, specific analyses are provided of how the well completion pattern influences the fracture network.

Abstract: The invention relates to systems, apparatus and methods for integrated recovery and in-situ (in reservoir) upgrading of heavy oil and oil sand bitumens. The systems, apparatus and methods enable enhanced recovery of heavy oil in a production well by introducing a hot fluid including a vacuum or atmospheric residue fraction or deasphalted oil into the production well under conditions to promote hydrocarbon upgrading. The methods may further include introducing hydrogen and a catalyst together with the injection of the hot fluid into the production well to further promote hydrocarbon upgrading reactions. In addition, the invention relates to enhanced oil production methodologies within conventional oil reservoirs.