Cheng Zhi Liu

Geological and Seismic Stratigraphy of Wangfu Sag

By combining seismic with geology, we processing a detailed stratigraphic classification in the Wangfu depressed areas. In this way, targeting the geologic horizons and seismic horizons in the wells according to the synthetic seismic logs. We may gain an Corresponding Relation between seismic with geology. Then compare the stratigraphic division . From the point of evolutionary history of regional structure, geological information generated by tectonic movement was recorded, for example, plane of unconformity, sedimentary cycle, lithology, lithofacies, and their responds in the seismic profile.

Research on Diagenesis of Volcanic Reservoirs in YS2,3 Well Fields

Based on the comprehensive utilization of core, thin section identification, scanning electron microscopy and other technical means, through the YS2, 3 well fields of volcanic rock lithology and lithofacies analysis; understand that the formation and evolution of volcanic reservoirs play a constructive role and destructive effect ，which has important guiding significance[1,2].

Study on Volcanic Facies of Yingcheng Formation in Yaoshen Area

There are two classification including volcanic lava and volcanic clastic rock, totally 15 types in Yingcheng Formation, Yaoshen area. The lithology is mainly characterized as acid rhyolite, tuffs and volcanic breccia. By using logging data and seismic data, the authors come to the conclusion as follows: there existed five types of lithofacies of volcanic lava in this area, with eruption-overflow facies most widely developed. The section is characterized as eruption mixed with overflow, superposed eruption-overflow facies and volcanic sedimentary facies occurred far from the crater. There are frequent volcanic activities, multi-periodic activities of volcanic eruption developed, thus multi-periodic eruption modes were formed. This area is overlapped and connected in the plane, adjacent eruption facies are often connected, overflow facies are distributed on lave platform.

Volcanic Diagenesis and Influence on the Reservoir Space Evolution of Yingcheng Formation in Xunjiaweizi Fault Depression

The research on volcanic diagenesis have important value in volcanic secondary pore formation, evolution and reservoir prediction. Using core, slice, imaging logging and geochemical analysis, from lithology-lithofacies characteristics of Yingcheng Formation in Xujiaweizi depression, Songliao Basin, study on volcanic diagenesis, types, characteristics and relationship of reservoir space. The results are shown that: The volcanic mainly developed dissolution 13 diagenesis types, and base on the formation mechanism and effect to the reservoir space, it is divided further into constructive and destructive categories In the study area; Reservoir performance of reservoir space depend on the type, combination form and development degree, and the diagenesis is main control factor of rservoir space (pore, crack) formation, preservation, damage evolution characteristics; volcanic diagenetic complexity is the main reason of reservoir space complexity and diversity.

Research on Sedimentary Microfacies of Sandstone Group I in Putaohua Oil Reservoir of Gu83 Block in Gulong Oilfield

The oil and gas reserves of Gu83 block in Gulong oilfield is very abundant, but the development is very difficult because the sand bodies are thin, scattered and lack of horizontal continuity. Guided by the theory of sequence stratigraphy and reservoir sedimentology, using drilling core, logging and seismic data, the researcher found that the interest area belongs to delta front subfacies deposition, which can be mainly classified by four miscrofacies types including underwater distributary channel, mouth, sheet sand and bay between distributary. The plane distribution of sedimentary microfacies are mainly controlled by the west and north provenance, the two source collected in the middle east of the work area.

Volcanic Rock Diagenesis and Characteristics Analysis of Yingcheng Formation in Yaoyingtai Area

Research on volcanic rock diagenesis have important reference value in volcanic rock secondary pore formation, evolution and reservoir prediction. Using the core data, flakes, imaging logging, geochemicals analysis and lithologies-lithofacies characteristics of Yaoyingtai area in Yingcheng Formation, Changling fault depression, we research on the volcanic rock diagenesis, reservoir space types, characteristics and relationships. The results are shown that: The research area mainly develop volcanic rock mantle thermal liquid alkali metasomatism and other 11 diagenesis types, and base on diagenesis formation mechanism and the effects of the reservoir spaces, which is divided constructive and destructive.

Research Progress on Volcanic Rock Reservoirs Based on Properties of Energy Materials in Songliao Basin

Properties of Energy Materials (oil and gas) is very complex and important. In recent years, in Chinese eastern, western and mid continental basins, multiple rock oil and gas fields are found, such as Songliao Basin, Bohai Bay Basin, Erlian Basin, Tuha Basin, Junggar Basin, Sichuan Basin. Volcanic rock reservoir with its rich oil and gas resources, tremendous development potential, has aroused the domestic and foreign experts and scholars attention, volcanic rock oil and gas exploration theory and technology has been rapid development. In order to understand volcanic rock reservoir from the origin, further exploration target and guide the exploration deployment, the Properties of Energy Materials (oil and gas), main factors affecting of the development and comprehensive evaluation have become the research hot spots and the focus, there are many research techniques and results.

The Types of Sedimentary Facies and Rock Characteristics of Xujiaweizi Fault Depression in Songliao Basin

In the Shahezi Formation of Xujiaweizi fault depression in the Songliao Basin mainly tow sedimentary system is developed: the Xudong gentle slope belt and Xuxi fault zone systems. However, this area is little studied as there have been only limited efforts in exploration. Based on the latest drilling, outcrop data, description of core observation and laboratory microscope identification, it has been concluded that four mainly sedimentary facies are developed in this area: braided river delta, fan delta, lacustrine facies and sublacustrine fan. The subaqueous distribute channel is the main type of the fan delta front while the braided channel is the main type of the braided river delta. A number of clastic, sandstone and mudstone are developed in these two types of sedimentary facies. We can use it to make further study of dividing into micro-facies.

The Research on Sequence Stratigraphy of Shahezi Formation in Xujiaweizi Depression

By using the data of core, geological log and seism and the theory of sedimentology and sequence stratigraphy , the sequence of Shahezi formation in Xujiaweizi depression are divided into five third-order sequence, they are SQ1, SQ2, SQ3, SQ4 and SQ5 up towards. The range of SQ1 is limited, influenced by palaeogeomorphology. SQ5 are greatly influenced by the late sedimentary denudation, now only in the northwest of the study area can be seen, other part is missing in this layer. SQ1, SQ2, SQ3 are onlap filled. There are defective area in SQ4 and SQ5.

Volcanic Oil and Gas Reservoir Characteristics and Comprehensive Evaluation in Oulituozi Area

Based on the core, thin section, scanning electron microscopy, well logging and the physical properties of reservoir, according to the research on the volcanic reservoirs characteristics of the E2-3S3 Formation in Oulituozi area, obtaining the following points: Basalt, trachyte and tuff are mainly lithology, overflow facies are main lithofacies, secondly explosive facies and volcanic sedimentary facies; Secondary reservoir spaces are often superimposed on the original reservoir spaces, and pore, hole and slit together form the effective reservoir spaces; The reservoir property show that the trachyte are the best, secondly the basalt and tuff; Reservoir lithology, lithofacies, thickness, fracture development, physical and electrical properties and other reservoir parameters are the main evaluation criteria to conduct the reservoir comprehensive evaluation.