Advanced Materials Research Vols. 962-965

Abstract: Interlayer is a kind of rock body that reflects the seepage barrier in the reservoir sandstones. As the interlayer playing a blocking role of hydrocarbon accumulation, we can better understand the characteristics of the reservoir heterogeneity through the analysis of the causes and spatial distribution of the interlayer. Empirically, identification of four types of interlayer, including muddy interlayer, calcium interlayer, physical layer, and indistinguishable interlayer, contributes to effective production of tight gas sandstones. Each category of interlayer has a separate characteristic of the lithology and logging curves. Identifying interlayer provides a way to analyzing spatial distribution of interlayer in the tight gas field. 2-D and 3-D geological models corresponding to the distribution of interlayer can be able to establish to characterize distribution variations within the reservoirs, which show the space matching relation serving for the tight gas production.

Abstract: GC and GM-MS experiments are exerted for 34 oil samples in shallow water area of Liaohe Depression. The results show that Gas chromatograms are clear, continuous and intact which means the bio-degradation can be ignored. Originally the sediments are mainly deposited under oxidization environment. The oil resource is composed by the bacteria, aquatic organisms and higher plans. The depositional environment changes from reductive type to oxidization in the W-E direction. The salt content is high. From Lingnan well area in the west to Kuihua well area in the east the oil maturity increases. According to the depositional environment, source rocks and maturity features the oil samples are divided into 3 types. A is located in the west and centre of study area and Gammacerane index is less than 0.2. B in the centre and east. A and B are different in the organic import degree. To be specific the A is mainly supported by aquatic organisms while the B by continental materials. C has high gammacerane of more than 0.55, which comes from salt water environment.

Abstract: Shale gas, which has been demonstrated as a rediscovered resource that might largely alleviate the increasing pressure for fuel demand, has been under extensive exploration and development in China. However, there are too few commercial shale gas plays discovered up to now due to several reasons, including the complex geologic setting, lack of mature pipeline infrastructure, etc. A detailed review of the current situation of exploration and development for shale gas in China is offered and suggestions concerning future exploration and development are made.

Abstract: Reservoir plane features of Changling No.1 gas field is analyzed with multiattribute analysis. Through the production of fine synthetic seismograms, the research area is analyzed by seismic attribute. On the basis of the calibration of synthetic seismograms and interpretation of horizon, accurate corresponding relation between the seismic reflection and geological horizon is established. By means of multiple attribute extraction technology, relatively independent attributes related to oil and gas are selected, and afterwards the analysis of the petrophysical characteristics and the optimization of the seismic attribute are achieved. Finally, through the seismic attributes analysis technology and the horizon slice technology, the favorable areas of gas accumulation are predicted.

Abstract: Sedimentary facies plane features of Changling No.1 gas field is analyzed with multiattribute analysis. In Changling area, the signal to noise ratio of the seismic data is low and the sand body distribution in lateral lithologic reservoir changes fast. In this condition, research of seismic sedimentology is launched. Through the seismic stratigraphic classification, the target stratum, Denglouku group is divided into four sand groups. On the basis of the calibration of synthetic seismograms and interpretation of horizon, accurate corresponding relation between the seismic reflection and geological horizon is established. By means of multiple attribute extraction technology, relatively independent attributes related to oil and gas are selected, and afterwards the analysis of the petrophysical characteristics and the optimization of the seismic attribute are achieved. Finally, through the seismic attributes analysis technology and the horizon slice technology, combined with the result of sedimentary facies analysis, the favorable areas of gas accumulation are predicted.

Abstract: Effective mud shale system of Hetaoyuan Formation in the Biyang Depression was divided base on geological and exploratory conditions. According to the relationship between TOC and oiliness, the classification evaluation criteria was identified to reflect the shale oil accumulation degree. Using ΔlogR method to identify organic carbon and oiliness, and the loss part of the oil was recovery corrected. According to the mechanism of generation-expulsion, the criteria of movable oil was identified. Using volume method, the total and movable oil resources were calculated. The results show that effective mud shale system is found mainly in the deep depression; shale oil resources is divided into three grades: enriched resources, low efficient resources, scattered resources; logging method can be used to identify organic carbon and oiliness; it is necessary to correct light and weight hydrocarbon. The total systematic resources is 894 million tons to 945 million tons, the total movable resources is 246 million tons to 237 million tons, the Upper Member of Eh₃ resources have a higher degree of enrichment than the other two. Movable resources accounts for more than 25 percent of the total, and more than 90 percent of movable resources is attributed to Class I resources.

Abstract: Use techniques of coherence body, dip body, azimuth body, variance body and ants body to implement the fracture structure in the study area and study the fault distribution. Fine make logging synthetic seismogram in the study area, compare multi-well jointly, use the time-frequency analysis technology combined with core and logging data to track to explain the target layers.Make the velocity model and give the structure diagram of target layers by time-depth conversionon the basis of full three-dimensional interpretation and high-precision synthetic seismogram.

Abstract: Northern Honggang Area is situated in the north of Daan-Honggang terraces, southern Songliao Basin, bounded on the west of the western slope, on the northeast by Cologne sag, and on the southeast by Changling sag. The facies types of Northern Honggang District are mainly delta. The upper part of Fuyu oil layer is dominated by delta-front facies, the lower part is dominated by delta-plain facies.

Abstract: With the further and high level of hydrocarbon exploration and development in China even around the world, the hydrocarbon exploration tend to be the fine and comprehensive exploration and targets are mainly plays or traps, the structural trap, is the mainly exploration targets, will gradually give way to the alternative exploration objects, the litho-stratigraphic traps, which are more subtle and competitive. Therefore, the new trap evaluation theory model needed to be work out to speed up the hydrocarbon exploration. According to the characteristics of the hydrocarbon traps exploration at present stage, this paper deeply analyzes the trap evaluation contents and characteristics, on the basis of combination with the qualitative and quantitative comprehensive research of trap evaluation parameters, the essential evaluation model is corresponding to traps is established finally.

Abstract: Based on the biomarks parameters, we contrast and analyze the relationship between the crude oil of Fuyu and Yangdachengzi oil beds in Chaoyanggou oilfield and the mudstone source rocks of the 1st Member of Qingshangkou formation in Sanzhao depression. There are two source rocks of crude oil in Fuyu oil bed of Chaoyanggou oilfield. They are the mudstone source rocks of the 1st Member of Qingshangkou formation in Sanzhao depression and in Chaoyanggou oilfield, and the contribution of the two source rocks to Fuyu oil bed are nearly the same. The crude oil of Yangdachengzi oil bed in Chaoyanggou oilfield has close relationship to the mudstone source rocks of the 1st Member of Qingshangkou formation in Sanzhao depression, but the relationship with the mudstone source rocks of the 1st Member of Qingshangkou formation in Chaoyanggou oilfield is not obvious. It conforms to the facts that the lower overpressure of mudstone source rocks in Chaoyanggou oilfield makes the thickness of the oil and gas downward shallowed and the quantity of oil into Yangdachengzi oil bed decreased.