CN109087015B - Comprehensive evaluation method for favorable zone of deep oil-gas exploration in middle ancient world - Google Patents
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Abstract
The invention discloses a comprehensive evaluation method for favorable zones of deep oil-gas exploration in the middle ancient life, which comprises the steps of analyzing resource potential in the middle ancient life zone; analyzing the accumulation elements and evaluating the exploration directions of different types of buried mountains in the middle and ancient life; and evaluating favorable zone targets in the middle and ancient communities. The evaluation method has the advantages that the oil gas exploration potential in the middle and ancient world of a large harbor exploration area is implemented through the evaluation of oil gas reservoir geological elements such as generation, storage, covering, transportation, circling, protection and the like in the deep layer system oil gas exploration field, and the oil gas increase and storage direction is determined.
Description
Technical Field
The invention belongs to the technical field of oil exploration, and relates to a comprehensive evaluation method for favorable zones of deep oil and gas exploration in the middle ancient world.
Background
As one of conventional oil and gas reservoirs, the hidden mountain oil and gas reservoir can be formed or not, and the scale of the formed reservoir is influenced by the space-time matching relation of a series of formed reservoir elements. Due to the particularity of the buried hill oil and gas reservoir, the conditions required for the oil and gas to be gathered into the reservoir in the trap of the buried hill are more severe, and the main controlled factors of different buried hill oil and gas reservoirs are different. Gaoreqi et al think that the difference of the oil gas distribution of the buried hill is mainly controlled by the difference of the type of the basin foundation and the sunken mountainous period; pair et al (2007) think that the Bell-cave Bradadt group buried hill oil and gas reservoir is controlled by the common control of source rock, reservoir, fracture, oil and gas migration convergence zone and trap; the Monsanto and Weimen and the like (2007) consider that the dominant lithology is the key of the buried oil and gas reservoir of the type of buried oil and gas by researching the buried metamorphic rock inside the Liaohe river; the Zhao Xianzheng and the like (2012) consider effective storage and cover combination and good oil and gas migration channels as main control factors for the formation of the hidden buried hill oil and gas reservoir through the research on the depressed hidden buried hill oil and gas reservoir in the wing. According to the evolution characteristics of a fracture structural zone of a depressed central buried hill in a wing, the Yishiwei and the like (2010) divide the fracture structural zone into 3 types of early-long-middle-late stable, early-long-middle-late stable and early-long-middle stable, and accordingly 3 buried hill hidden modes are formed. Leersing et al (2004) consider that the diversity of the hidden hill types determines the diversity of the reservoir types, and the different types of hidden hills have different accumulation conditions and accumulation modes, which are summarized as tension-type hidden hill accumulation mode, squeeze-tension-type hidden hill accumulation mode, and erosion-type hidden hill accumulation mode. According to the position relation between a hydrocarbon source rock and a reservoir, the high pilot system summarizes three types of underground source reverse flow type, edge side supply type and external source transportation type underground source hydrocarbon reservoir modes through deep research on the underground depressed metamorphic rock underground hydrocarbon reservoir of the Liaohe river.
Oil and gas resource evaluation methods are more, and can be divided into a cause method, a class comparison method and a statistical method according to the principle of the evaluation method. The foreign oil and gas resource evaluation methods mainly comprise a similarity method and a statistical method, because the basin simulation technology is deeply and systematically researched in China, the similarity method and the statistical method are weak to be researched, and a large amount of data support is lacked, the oil and gas resource evaluation in China is mainly a cause method at present, and the statistical method and the similarity method are relatively rarely used (Zhou Suo Yu, 2004). The basic principle of the cause method (also called a material balance method) is to study conditions of oil gas generation, migration, accumulation, storage and the like, establish an oil gas generation, migration and accumulation geological model and a mathematical model, and predict oil gas resource quantity. At present, the causative methods widely used mainly include an organic carbon method, a basin simulation method, a kerogen pyrolysis method, a chloroform pitch "a" method, and the like. The analogy method is to obtain the oil and gas resource quantity of an unknown region according to the similarity between the oil and gas geological conditions of a known region (an exploration mature region) and the oil and gas geological conditions of another unknown region at the initial exploration stage (Husenqing, 2002; Zhao Wenzhi et al, 2005). The key factors of the analogy method evaluation are geological analogy unit selection and analogy coefficient calculation. The selection of the geological analogy unit is the basis of the analogy method evaluation, the selected evaluation area and the analogy area should have similar structures, deposition evolution, oil and gas reservoir conditions and the like, the evaluation area and the analogy area are ensured to have approximately the same resource abundance (Guo Jianyu and the like, 2006), and the selected analogy parameters must be key parameters for controlling the oil and gas distribution rule of the analogy area. The statistical method is to build a relevant model to predict the future change process (thicknessing, 2007) according to the determined system change rule, and because of the introduction of the probability theory and the mathematical statistical model and the building of the exploration sampling model, the oil and gas resource evaluation theory and the application of the statistical method are developed rapidly. The probability method of the oil and gas reservoir scale is a probability method for estimating the distribution parameters and the number of the oil and gas reservoir scale according to geological information of the oil and gas reservoir found in an evaluation area, establishing a suitable geologic body coefficient model and predicting the oil and gas reservoir scale and the number. The core of the method is the selection of a probability distribution density function of an oil and gas reservoir scale, the existing probability density distribution function models are more and mainly comprise lognormal distribution, King distribution, log-lognormal distribution, truncation offset Pareto distribution, Fiberman distribution, generalized Pareto (Pareto) distribution and the like, and the most common are lognormal distribution (Arps et al, 1958; Davis et al, 1989; Forman et al, 2011) and truncation offset Pareto distribution models (Houghton et al, 1973).
The oil and gas sources in the great harbor and ancient countries are always a long-term controversial problem, the calculation of the hydrocarbon generation amount and the determination of the migration and aggregation coefficient are lack of basis before the problem of the oil and gas sources is not solved, and the results obtained by the causal evaluation are also lack of reliability. The analogy method is an evaluation method widely used internationally. The key of the analogy method lies in three aspects, namely, an analogy scale area which has pertinence and reflects the characteristics of an evaluation object; secondly, an analog evaluation parameter system and a parameter value standard which are suitable for the petroleum geological characteristics of the evaluation object are provided; third, there is an analog evaluation method suitable for the evaluation object. The parameter system and the value standard of the analog evaluation established by the domestic third evaluation are mainly suitable for clastic rock strata series and are not suitable for carbonate reservoir, so that a targeted analog evaluation method, an analog parameter system and a value standard must be established according to the petroleum geological characteristics of a research area. In addition, although there are many statistical methods, the use of these methods is also a prerequisite. Firstly, an evaluation object is required to have a certain exploration degree, a certain number of oil and gas fields or oil and gas reservoirs are found, and a distribution model or a discovery model of the oil and gas fields can be established according to the known oil and gas fields; secondly, the cause units (oil and gas systems, gathering units or zones) used by the statistical method must be determined, and the application of the statistical method is obviously difficult due to the low exploration degree. Therefore, aiming at the petroleum geological characteristics of the middle and ancient world, a resource evaluation parameter system suitable for deep petroleum geological characteristics needs to be established by combining with petroleum reservoir formation research, and an evaluation method is comprehensively selected to realize objective evaluation of oil and gas resources.
In recent years, the middle and ancient China has made an important breakthrough as a new field of oil and gas exploration in a great port exploration area, the Wanggangtun hidden mountain and the Chenghai hidden mountain obtain high-yield airflow, and the great port drilling of the great port hidden mountain in North China has also achieved good effects. However, the middle and old world strata are subjected to multi-phase structure movement transformation, so that the configurations of the middle and old world structures, the strata, sand bodies, oil and gas reservoirs and the like are complex, and the effective hydrocarbon layer system distribution, the high-quality reservoir distribution and the oil and gas reservoir formation mechanism are unclear due to the lack of system research in the fields of the middle and old world structures, the sedimentary reservoirs, the hydrocarbon source rocks, the reservoir formation and the like at present, so that the further expansion of the exploration field is restricted.
Disclosure of Invention
The invention aims to provide a comprehensive evaluation method for a beneficial zone of deep oil and gas exploration in middle and old world, which has the beneficial effects that the integral and systematic evaluation is carried out around the oil and gas reservoir foundation geology of 'hydrocarbon formation-storage-reservoir formation' in the large-port exploration area and the old world (the important point is the old world), and the potential of oil and gas resources and the oil and gas reservoir formation mechanism at deep layers of the middle and old world and other layers are indicated aiming at the hydrocarbon source rock hydrocarbon generation mechanism and evaluation, the scale effective reservoir formation and storage, the oil and gas reservoir formation mechanism and hydrocarbon storage, the beneficial zone evaluation and the like which restrict the oil and gas exploration in the large-port exploration area and the old world; through the evaluation of oil gas reservoir geological elements in the field of oil gas exploration of deep strata series, such as generation, storage, covering, transportation, circling, protection and the like, the oil gas exploration potential in a large harbor exploration area and an ancient world is implemented, and the oil gas increasing and storing direction is determined.
The technical scheme adopted by the invention comprises the steps of analyzing the resource potential of the Zhongsheng and Gusheng jungions; analyzing the accumulation elements and evaluating the exploration directions of different types of buried mountains in the middle and ancient life; and evaluating favorable zone targets in the middle and ancient communities.
Further, the resource potential analysis of the middle and ancient boundary zones comprises the following steps:
the evaluation of the oil-gas enrichment rule and the main control factors of the zone: according to the fine dissection result of a typical oil-gas reservoir in reservoir research, main oil-gas zones in the middle and ancient communities are determined, and the oil-gas enrichment rule and the main control factors of the zones are revealed;
secondly, evaluating the oil and gas resource amount of the key mountain-diving zone: according to an oil gas enrichment rule, dividing oil gas resource evaluation units of key layer systems in the middle and ancient life circles, establishing an oil gas resource evaluation parameter distribution model by combining oil gas zone reservoir formation main control factors, determining key evaluation parameters, and evaluating the oil gas resource quantity of the key layer systems by comprehensively utilizing a cause method, a class comparison method and a statistical method;
third, evaluating the resource potential of the zone: and according to the evaluation result of the oil and gas resource amount, evaluating the resource potential of the key layer system in the middle and ancient life circles by using a geological statistics technology, a geophysical technology, a reservoir evaluation technology and an integrated reservoir evaluation technology.
Further, the analysis of the accumulation elements and the evaluation of the exploration direction of different types of buried mountains in the middle and ancient life comprise the following steps:
analyzing the buried elements of different types of buried mountains: selecting different types of buried mountains of ancient and newborn paleoreservoirs, and analyzing oil and gas sources, storage spaces, transportation systems and storage condition formation factors of the buried mountains to determine formation key factors of the buried mountains of various types;
the evaluation of exploration direction is facilitated: and on the basis of the analysis of the hidden elements, evaluating and preferably selecting the exploration directions of different types of hidden mountains by combining the structure style spread characteristics of the hidden mountains and the evaluation results of the resource potential of the zone.
Further, the target evaluation of the beneficial zone of the middle and ancient communities is a comprehensive hydrocarbon-reservoir research result, and the beneficial exploration zone of the middle and ancient communities is determined by combining the analysis of the resource potential and the exploration direction of the zone, and the reservoir conditions of the beneficial exploration zone are comprehensively evaluated to indicate the target of the beneficial exploration zone.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The comprehensive evaluation method for the advantageous zone of ancient boundary deep oil and gas exploration comprises the following steps:
1. analyzing resource potential in the middle and ancient junctures;
the evaluation of the oil-gas enrichment rule and the main control factors of the zone: according to the fine dissection results of typical oil and gas reservoirs in reservoir research, main oil and gas zones in the middle and ancient life are determined, and the oil and gas enrichment rules and the main control factors of the zones are revealed.
Secondly, evaluating the oil and gas resource amount of the key mountain-diving zone: according to an oil gas enrichment rule, oil gas resource evaluation units of middle and ancient world key layer systems (mainly coal source rocks of the ancient world and considering middle-world argillaceous source rocks) are divided, an oil gas resource evaluation parameter distribution model is established by combining oil gas zone formation main control factors, key evaluation parameters are determined, and oil gas resource quantity of the key layer systems is evaluated by comprehensively utilizing a cause method, a class comparison method and a statistical method.
Third, evaluating the resource potential of the zone: and according to the evaluation result of the oil and gas resource amount, evaluating the resource potential of the key layer system in the middle and ancient life by utilizing a geological statistical technology, a geophysical technology, a reservoir evaluation technology, an integrated reservoir evaluation technology and the like.
2. Analyzing the accumulation elements and evaluating the exploration directions of different types of buried mountains in the middle and ancient life;
analyzing the buried elements of different types of buried mountains: selecting different hidden mountain types such as ancient storage types (such as Chenghai, Wanguantun, Wumaying and the like) and newborn ancient storage types (such as kilometer bridge) and the like, analyzing the hidden factors such as oil and gas sources, storage spaces, transportation systems, storage conditions and the like, and determining the hidden key factors of various types of hidden mountains.
The evaluation of exploration direction is facilitated: and on the basis of the analysis of the hidden elements, evaluating and preferably selecting the exploration directions of different types of hidden mountains by combining the structure style spread characteristics of the hidden mountains and the evaluation results of the resource potential of the zone.
3. Target evaluation of beneficial zones in the middle and ancient life;
the research results of hydrocarbon-reservoir formation are synthesized, the favorable exploration zones of the middle and ancient communities are determined by combining the analysis of the resource potential and the exploration direction of the zones, and the reservoir formation conditions are comprehensively evaluated to indicate the targets of the favorable exploration zones.
According to the invention, through the systematic research of 'hydrocarbon formation-storage-accumulation' in ancient world in a large harbor exploration area, the hydrocarbon formation mechanism and the oil-gas potential of different types of hydrocarbon source rocks in the middle and ancient world are determined; the characteristics of rock formation evolution of an inner curtain reservoir in a submarine are combed, and the combination and distribution rule of the inner curtain advantage reservoir cover is determined; and establishing a multilayer series inner curtain type buried hill oil and gas enrichment accumulation mode, and clarifying the oil and gas accumulation mechanism and exploration potential of key strata and key blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the present invention.
Claims (1)
1. The comprehensive evaluation method for the favorable zone of deep oil and gas exploration in the middle ancient world is characterized by comprising the following steps of: the method comprises the steps of analyzing the resource potential of the Chinese and ancient junctures; analyzing the accumulation elements and evaluating the exploration directions of different types of buried mountains in the middle and ancient life; target evaluation of beneficial zones in the middle and ancient life; the resource potential analysis of the middle and ancient boundary zones comprises the following steps:
the evaluation of the oil-gas enrichment rule and the main control factors of the zone: according to the fine dissection result of a typical oil-gas reservoir in reservoir research, main oil-gas zones in the middle and ancient communities are determined, and the oil-gas enrichment rule and the main control factors of the zones are revealed;
secondly, evaluating the oil and gas resource amount of the key mountain-diving zone: according to an oil gas enrichment rule, dividing oil gas resource evaluation units of key layer systems in the middle and ancient life circles, establishing an oil gas resource evaluation parameter distribution model by combining oil gas zone reservoir formation main control factors, determining key evaluation parameters, and evaluating the oil gas resource quantity of the key layer systems by comprehensively utilizing a cause method, a class comparison method and a statistical method;
third, evaluating the resource potential of the zone: according to the evaluation result of the oil and gas resource amount, evaluating the resource potential of the key layer system in the middle and ancient life circles by using a geological statistics technology, a geophysical technology, a reservoir evaluation technology and an integrated reservoir evaluation technology;
the analysis of the accumulation elements and the evaluation of the exploration direction of different types of buried mountains in the middle and ancient life comprises the following steps:
analyzing the buried elements of different types of buried mountains: selecting different types of buried mountains of ancient and newborn paleoreservoirs, and analyzing oil and gas sources, storage spaces, transportation systems and storage condition formation factors of the buried mountains to determine formation key factors of the buried mountains of various types;
the evaluation of exploration direction is facilitated: on the basis of the analysis of the hidden elements, evaluating and preferably selecting exploration directions of different types of hidden mountains by combining the structure style spread characteristics of the hidden mountains and the evaluation results of the resource potential of the zones;
the target evaluation of the beneficial zone of the Zhongshengjie and Gushengjie is a comprehensive hydrocarbon-reservoir research result, and the beneficial exploration zone of the Zhongshengjie and Gushengjie is determined by combining the analysis of the resource potential and the exploration direction of the zone, and the reservoir conditions are comprehensively evaluated to indicate the target of the beneficial exploration zone.
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