Method for oil-gas accumulation simulation and oil-gas exploration based on hydrocarbon source rock simulation material

Abstract

The invention discloses a hydrocarbon source rock simulation material-based oil and gas reservoir forming simulation and oil and gas exploration method. The hydrocarbon source rock simulation material-based oil and gas reservoir forming simulation method comprises the following steps of: obtaining organic carbon content parameters of hydrocarbon source rocks at different positions in a research area; based on the organic carbon content parameter, preparing a hydrocarbon source rock simulation material from butter and quartz sand, and mixing to obtain a hydrocarbon source rock simulation material mixture at different positions; based on the stratigraphic sequence and structural characteristics of the research area, hydrocarbon source rock simulation material mixtures are arranged at different positions in the initial experimental model, so that a structural reservoir control model containing the hydrocarbon source rock simulation material mixtures is constructed; and constructing a heating model based on the hydrocarbon source rock maturation time in the research area, and carrying out a reservoir forming simulation experiment on the structural reservoir control model by using the heating model. According to the method, the hydrocarbon source rock simulation materials are laid at different positions in the initial experiment model, and hydrocarbon source rock powder does not need to be injected in an injection mode, so that the structure of the initial model is not damaged any more, and unexpected technical effects are achieved through a simulation test.

Description

Technical Field

[0001] The present invention relates to the technical field of physical simulation of structural deformation in earth science and petroleum industry, and in particular to a method for oil and gas reservoir simulation and oil and gas exploration based on hydrocarbon source rock simulation materials. Background Art

[0002] Structural physical simulation is the main method to study the formation and evolution process and mechanism of geological structures in nature, among which the selection of simulation materials is the key. Source rock is a set of organic-rich sedimentary strata in sedimentary basins, which plays a vital role in oil and gas accumulation and exploration. In traditional structural control and reservoir physical simulation experiments, quartz sand is used to simulate reservoirs, silicon powder is used to simulate caprocks, and source rock powder is often added by point injection or surface injection outside the model. Summary of the invention

[0003] In physical structure simulation, in order to avoid damaging the already laid strata or structures in the process of adding source rock powder, and thus truly simulate the structural evolution process to achieve the purpose of enriching technical routes and increasing selection space, an embodiment of the present invention provides a method for oil and gas reservoir simulation and oil and gas exploration based on source rock simulation materials.

[0004] In a first aspect, an embodiment of the present invention provides a method for simulating oil and gas reservoir formation based on source rock simulation materials, which may include:

[0005] Obtain the organic carbon content parameters of source rocks at different locations in the study area;

[0006] Based on the organic carbon content parameter, the source rock simulation material is prepared and mixed with butter and quartz sand to obtain a mixture of source rock simulation materials at different locations;

[0007] Based on the stratigraphic sequence and structural characteristics of the study area, the source rock simulation material mixture is set at different positions in the initial experimental model to construct a structural reservoir control model containing the source rock simulation material mixture;

[0008] A heating model is constructed based on the maturity time of source rocks in the study area, and a reservoir simulation experiment is carried out on the structural control reservoir model using the heating model.

[0009] Optionally, the step of preparing the source rock simulation material with butter and quartz sand and mixing them based on the organic carbon content parameter to obtain a mixture of source rock simulation materials at different locations may include:

[0010] Based on the organic carbon content parameter and the quantitative relationship between the pre-constructed proportionality coefficient between butter and quartz sand and the organic carbon content parameter, determining the proportionality coefficient of the source rock simulation material at different locations;

[0011] Based on the proportion coefficient of the source rock simulation material at different locations, the source rock simulation material is configured with butter and quartz sand and mixed to obtain a mixture of the source rock simulation material at different locations.

[0012] Optionally, the quantitative relationship is pre-constructed by the following method:

[0013] The fitting is performed based on source rocks with different organic carbon contents and the proportional coefficients of different volumes of butter and quartz sand to obtain the quantitative relationship between the proportional coefficient of butter and quartz sand and organic carbon.

[0014] Optionally, the heating model is constructed based on the characteristics of the tectonic period and the maturity time of the source rock.

[0015] Optionally, the heating model is a 50°C constant temperature heating mode.

[0016] Optionally, after conducting the reservoir formation simulation experiment, the method may also include: scanning or slicing the simulation experiment results through CT to guide the deployment of oil and gas exploration in the study area based on the CT scanning results and slicing results.

[0017] Optionally, the organic carbon content parameters of source rocks at different locations in the study area can be obtained, which may include:

[0018] The source rock samples made from field outcrops and cores in the study area are tested to obtain the organic carbon content parameters of the source rocks.

[0019] Optionally, the method may further include: obtaining organic carbon content parameters of the source rock based on well logging data of the study area.

[0020] Optionally, the butter is edible butter.

[0021] In a second aspect, an embodiment of the present invention provides an oil and gas exploration method, which may include:

[0022] Conducting oil and gas reservoir simulation based on geological data, well logging data and / or seismic data of the study area, and deploying exploration projects in the study area based on the simulation results;

[0023] Wherein, the oil and gas reservoir simulation is performed according to the oil and gas reservoir simulation method based on hydrocarbon source rock simulation materials described in the first aspect.

[0024] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0025] An embodiment of the present invention provides a method for oil and gas reservoir simulation and oil and gas exploration based on hydrocarbon source rock simulation materials. The hydrocarbon source rock simulation material is prepared by butter and quartz sand, and the source rock simulation material is used for laying at different positions in the initial experimental model. There is no need to inject hydrocarbon source rock powder by injection, which will not destroy the structure of the initial model. Unexpected technical effects are achieved through simulation experiments.

[0026] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0027] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 The present invention provides a flowchart of a method for simulating oil and gas reservoir formation based on source rock simulation materials in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] The inventors found in actual work that, since the existing source rocks are often injected with source rock powder by point injection or surface injection outside the model, this will destroy the already laid strata or structures. The reason for this is that the existing technical solutions lack a material that directly simulates the source rock in the model. In view of the above technical problems, an embodiment of the present invention provides a method for oil and gas reservoir simulation and oil and gas exploration based on source rock simulation materials. The oil and gas reservoir simulation method uses a material that simulates source rocks, that is, a mixture of butter and quartz sand in different proportions to simulate source rocks with different organic matter contents, so as to achieve direct laying without injection for simulation.

[0032] The embodiment of the present invention provides a method for simulating oil and gas accumulation based on source rock simulation materials, referring to Figure 1 As shown, the method may include the following steps:

[0033] Step S11, obtaining organic carbon content parameters of source rocks at different locations in the study area.

[0034] In this step, the organic carbon content parameters of source rocks at different locations can be obtained by testing source rock samples made from field outcrops and cores in the study area to obtain the organic carbon content parameters of the source rocks, or can be obtained based on well logging data in the study area. The embodiments of the present invention do not specifically limit this.

[0035] Step S12: Based on the organic carbon content parameter, the source rock simulation material is prepared with butter and quartz sand and mixed to obtain a mixture of source rock simulation materials at different locations.

[0036] This step is to prepare source rock simulation materials. First, based on the organic carbon content parameter and the quantitative relationship between the pre-constructed proportional coefficient between butter and quartz sand and the organic carbon content parameter, the proportional coefficient of the source rock simulation materials at different locations is determined; then, based on the proportional coefficient of the source rock simulation materials at different locations, the source rock simulation materials are configured with butter and quartz sand and mixed to obtain a mixture of source rock simulation materials at different locations.

[0037] In this step, fitting is performed based on source rocks with different organic carbon contents and the ratio coefficients of different volumes of butter and quartz sand to obtain the quantitative relationship between the ratio coefficient of butter and quartz sand and organic carbon. The inventor determined through fitting that the volume ratio of butter and quartz sand is 1:10, which can simulate source rocks with 10% organic carbon; the volume ratio of butter and quartz sand is 1:13, which can simulate source rocks with 8% organic carbon; the volume ratio of butter and quartz sand is 1:16, which can simulate source rocks with 5% organic carbon; the volume ratio of butter and quartz sand is 1:20, which can simulate source rocks with 3% organic carbon.

[0038] It should be noted that, for the safety of the simulation test, the butter in this embodiment is edible butter.

[0039] In the embodiment of the present invention, the inventor accidentally discovered that by using the characteristics of butter that melts after heating and solidifies after natural standing, it can be used as a source rock simulation material after mixing with quartz sand. During use, the mixture is directly laid in the test box without destroying the existing model structure by injection. When the source rock simulation material was used for simulation tests, unexpected results were achieved, solving the technical problem of the existing heavy injection method damaging the laid stratum.

[0040] Step S13: Based on the stratigraphic sequence and structural characteristics of the study area, a mixture of source rock simulation materials is set at different positions in the initial experimental model to construct a structural reservoir control model containing the mixture of source rock simulation materials.

[0041] This step is to construct a laboratory structural reservoir control model based on the actual geological conditions of the study area.

[0042] Step S14: construct a heating model based on the maturity time of source rocks in the study area, and use the heating model to conduct reservoir simulation experiments on the structural reservoir control model.

[0043] This step is simulated based on the structural reservoir control model. In specific implementation, a heating model is constructed based on the structural stage characteristics combined with the maturity time of the source rock, so that the corresponding heating model can be formed in different stages before, during and after structural deformation. In the specific implementation of this embodiment, for example, the above heating model is a 50°C constant temperature heating method, which can melt butter, and the melted butter is transported and accumulated into reservoirs under the action of buoyancy.

[0044] Step S15: Scan or slice the simulation experiment results through CT to guide the deployment of oil and gas exploration in the study area based on the CT scanning results and the slice results.

[0045] The above-mentioned method for simulating oil and gas accumulation based on source rock simulation materials provided in an embodiment of the present invention prepares source rock simulation materials by using butter and quartz sand, and uses the source rock simulation materials for laying at different positions in the initial experimental model. There is no need to inject source rock powder by injection, which will not destroy the structure of the initial model. Unexpected technical effects have been achieved through simulation experiments.

[0046] Based on the same inventive concept, an oil and gas exploration method is also provided in an embodiment of the present invention, comprising:

[0047] Oil and gas reservoir simulation is carried out according to the geological data, logging data and / or seismic data of the study area, so as to deploy exploration engineering in the study area based on the simulation results; wherein, the oil and gas reservoir simulation is carried out according to the above-mentioned oil and gas reservoir simulation method based on source rock simulation materials.

[0048] In the oil and gas exploration method in the embodiment of the present invention, the exploration project needs to deploy drilling, survey lines and other projects, and the oil and gas reservoir simulation method provides a basis for the above-mentioned project deployment. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for simulating oil and gas accumulation based on source rock simulation materials, characterized in that: include: Obtain the organic carbon content parameters of source rocks at different locations in the study area; Based on the organic carbon content parameter, the source rock simulation material is prepared and mixed with butter and quartz sand to obtain a mixture of source rock simulation materials at different locations; Based on the stratigraphic sequence and structural characteristics of the study area, the source rock simulation material mixture is set at different positions in the initial experimental model to construct a structural reservoir control model containing the source rock simulation material mixture; A heating model is constructed based on the maturity time of source rocks in the study area, and a reservoir simulation experiment is carried out on the structural control reservoir model using the heating model.

2. The method according to claim 1, characterized in that The method of preparing the source rock simulation material with butter and quartz sand and mixing them based on the organic carbon content parameter to obtain a mixture of source rock simulation materials at different locations includes: Based on the organic carbon content parameter and the quantitative relationship between the pre-constructed proportionality coefficient between butter and quartz sand and the organic carbon content parameter, determining the proportionality coefficient of the source rock simulation materials at different locations; Based on the proportion coefficient of the source rock simulation material at different locations, the source rock simulation material is configured with butter and quartz sand and mixed to obtain a mixture of the source rock simulation material at different locations.

3. The method according to claim 2, characterized in that The quantitative relationship is pre-constructed by the following method: The fitting is performed based on source rocks with different organic carbon contents and the proportional coefficients of different volumes of butter and quartz sand to obtain the quantitative relationship between the proportional coefficient of butter and quartz sand and organic carbon.

4. The method according to claim 1, characterized in that The heating model is constructed based on the characteristics of the tectonic stages and the maturity time of the source rocks.

5. The method according to claim 4, characterized in that The heating model is a 50°C constant temperature heating mode.

6. The method according to claim 1, characterized in that After carrying out the reservoir simulation experiment, the method further includes: scanning or slicing the simulation experiment results through CT to guide the deployment of oil and gas exploration in the study area based on the CT scanning results and slicing results.

7. The method according to any one of claims 1 to 6, characterized in that: Obtain the organic carbon content parameters of source rocks at different locations in the study area, including: The source rock samples made from field outcrops and cores in the study area are tested to obtain the organic carbon content parameters of the source rocks.

8. The method according to claim 7, characterized in that Also includes: The organic carbon content parameters of the source rocks are obtained based on the well logging data of the study area.

9. The method according to any one of claims 1 to 6, characterized in that: The butter is edible butter.

10. An oil and gas exploration method, characterized in that: include: Conducting oil and gas reservoir simulation based on geological data, well logging data and / or seismic data of the study area, and deploying exploration projects in the study area based on the simulation results; Wherein, the oil and gas reservoir simulation is carried out according to the oil and gas reservoir simulation method based on hydrocarbon source rock simulation materials according to any one of claims 1 to 9.

Images