Reservoir Characteristics and its Main Controlling Factors of the Siegenian Formation of Devonian in X Block,Algeria

Abstract

The Siegenian Formation reservoir is a tight sandstone reservoir with relatively poor porosity and low permeability. In this paper, the reservoir characteristics and its main controlling factors of the Siegenian Formation in X block have been studied based on cores, well-logs, and formation test data including the thin sections and cast thin sections, observation of scanning electron microscope, pressured-mercury testing and X-ray diffraction analysis of clay minerals. During deposition of the Siegenian Formation, the depositional environment was predominated by lower shoreface, middle shoreface and offshore. The fine sandstone and siltstone formed in the middle shoreface environment is the main reservoir of the Siegenian Formation in X block. Six pore types including primary intergranular pores, intragranular dissolved pores, intergranular dissolved pores, moldic pores, cement dissolved pores and microfractures are identified in the Siegenian Formation reservoir. The quartz intergranular dissolved pores and the quartz overgrowth cement dissolved pores are found for the first time in this area. The secondary dissolution pore is the main pore type in X block. The pore throat has a small radius, poor connectivity and the pore structure parameters are poor. Combined with the petrophysical property and capillary pressure curves, the reservoir of the research area is divided into three types: mesopore-ultra low permeability reservoir (type I), low-middle porosityultra low permeability reservoir (type II) and low porosity-ultra low permeability reservoir (type III). Type II is the main reservoir in this area. The sedimentary environment, tectonism and diagenesis are the main controlling factors. Diagenesis is the most important controlling factor in this area. Diagenesis may play a catalytic role or may play a negative role on damage in the reservoir pore evolution. The compaction, pressure solution, cementation, replacement and cementation are the main diagenesis types which reduce the pore volume during the reservoir pore evolution. The dissolution including acidic dissolution and alkaline dissolution are the main diagenesis types which produce extra pore volume during the reservoir pore evolution. This study of the reservoir will guide the future exploration of this area.

Keywords

The Siegenian Formation Reservoir characteristics Pore types Pore structure Diagenesis Controlling factors Algeria

References

Abdelsalam

M.G.

Liegeois

J.P.

and Stern

R.J.

, 2002. The saharan metacraton. Journal of African Earth Sciences 34, 119–136.

Bennion

D.B.

Thomas

F.B.

and Bietz

R.F.

, 1996. Low permeability gas reservoirs: Problems, opportunities and solutions for drilling, completion, stimulation and production. Society of Petroleum Engineers 3, 55–77.

Bouabdallah

and Hameg

, 2003. Hydrocarbon potential of petroleum system, oued mya basin, Algeria. AAPG HEDBERG CONFERENCE, “Paleozoic and Triassic Petroleum Systems in North Africa”, Algiers, Algeria.

Bumby

A.J.

and Guiraud

, 2005. The geodynamic setting of the Phanerozoic basins of Africa. Journal of African Earth Sciences 43 (1–3), 1–12.

Cerepi

Durand

and Brosse

, 2002. Pore microgeometry analysis in low-resistivity sandstone reservoirs. Journal of Petroleum Science 35 (3–4), 205–232.

Chen

Y.D.

and Yu

H.L.

, 2008. Exploration potential of Hadjra block in the Triassic basin, Algeria. Natural Gas Industry 28(8), 22–25.

Fang

S.X.

and Hou

F.H.

, 1996. Hydrocarbon Reservoir Geology. China University of Petroleum Press, Dongying, pp.124–130.

Gao

Wang

Z.L.

Deng

Zhao

J.H.

and Yang

X.C.

, 2009. Physical property and origin of lowly permeable sandstone reservoir in Chang 2 division, Zhang-Han oilfield, Ordos Basin. Energy Exploration and Exploitation 27(5), 367–389.

Herkat

and Guiraud

, 2006. The relationships between tectonics and sedimentation in the Late Cretaceous series of the eastern Atlasic Domain (Algeria). Journal of African Earth Sciences 46(4), 346–370.

10.

Jiang

L.Z.

J.Y.

and Guo

B.C.

, 2004. Characteristics and mechanism of low permeability clastic reservoir in Chinese Petroliferous Basin. Acta sedimentologica sinica 22(1), 13–18.

11.

Jiang

Z.X.

, 2010. Sedimentology, 2st Edition. Petroleum Industry Press, Beijing, pp. 200–203.

12.

Kang

Y.L.

and Luo

P.Y.

, 2007. Current status and prospect of key techniques for exploration and production of tight sandstone gas reservoirs in China. Petroleum Exploration and Development 34(2), 239–245.

13.

Lander

R.H.

Walderhang

, 1999. Predicting porosity through simulating sandstone compaction and quartz cementation. APPG Bulletin 83(3), 433–449.

14.

D.R.

F.W.

and Tang

, 2006. Characteristics of petroleum geology of Triassic basin and the subordinate Oued Mya basin in Algeria and suggests for oil and gas exploration. Marine Origin Petroleum Geology 11(3), 19–26.

15.

Liu

C.Y.

Zhao

H.G.

and Sun

Y.Z.

, 2009. Tectonic background of Ordos Basin and its controlling role for basin evolution and energy mineral deposits. Energy Exploration and Exploitation 27(1), 15–27.

16.

Lundegard

P.D.

, 1992. Sandstone porosity loss – view of the importance of the compaction. Journal of Dedimentary Petrology 62, 250–260.

17.

Patricia

, 1994. Dove the dissolution kinetics of quartz in sodium chloride solutions at 25°C to 300°C. American Journal of Science 294, 665–712.

18.

Pittman

E. D.

and Larese

R. E.

, 1991. Compaction of lithic sands: Experimental results and applications. APPG Bulletin 75(8), 1186–1225.

19.

Qiu

L.W.

Jiang

Z.X.

Cao

Y.C.

Qiu

R.H.

and Chen

W.X.

, 2002. Alkaline diagenesis and its influence on a reservoir in the Biyang depression. Science in China (Series D) 45(7), 643–653.

20.

Qiu

L.W.

Jiang

Z.X.

and Chen

W.X.

, 2002. A new type of secondary porosity-quartz dissolution porosity. Acta Sedimentologica Sinica 20(4), 621–627.

21.

Qiu

Y.N.

and Xue

S.H.

, 1994. Evaluation Technique for Oil and Gas Reservoir. Petroleum Industry Press, Beijing, pp. 194–206.

22.

Selly

R.C.

, 1997. African Basins: The sedimentary basins of Northwest Africa: Structural evolution, Elsevier Press, Amsterdam, pp. 25–50.

23.

Shanley

K.W.

Cluff

R.M.

and Robinson

J.W.

, 2004. Factors controlling prolific gas production from low-permeability sandstone reservoirs: Implications for resource assessment, prospect development, and risk analysis. American Association of Petroleum Geologists Bulletin 88(8), 1083–1121.

24.

Sun

Y.Z.

Wang

B.S.

and Lin

M.Y.

, 1998. Maceral and geochemical characteristics of coal seam 1 and oil shale 1 in fault-controlled Huangxian Basin, China. Organic Geochenistry 29 (1–3), 583–591.

25.

Tester

J.W.

Worley

W.G.

Robinson

B.A.

Grigsby

C.O.

and Feerer

J.L.

, 1994. Correlating quartz dissolution kinetics in pure water from 25°C to 625°C. Geochim Cosmochim Acta 58(11), 2407–2420.

26.

Tong

X.G.

and Guan

Z.M.

, 2002. The Atlas of Worldwide Petroleum Exploration and Development (The Africa fascicule). Petroleum Industry Press, Beijing, pp. 38–49.

27.

Wen

H. J.

Yan

Jiang

F.C.

and Yang

J.X.

, 2007. The fractal characteristics of the pore texture in low porosity and low permeability reservoir. Journal of Daqing Petroleum Institute 31(1), 15–18.

28.

Wang

X.Z.

and Li

F.R.

, 2007. Main control factors of hydrocarbon accumulation and explorative potentials of Triassic basin in Algeria. Foreign Oilfield Engineering 23(10), 1–3.

29.

Weimer

R.J.

Sonnenberg

S.A.

and Young

G.B.

, 1986. Wattenberg Field, Denver Basin, Colorado: Geology of tight gas reservoirs. AAPG Studies Geology 24, 143–164.

30.

Y.L.

, 2007. The character of the capillary pressure in Guangli oil field reservoir. Inner Mongolia Petrochemical Industry 11, 133–135.

31.

Xin

C.J.

and He

Y.B.

, 2006. The application of the capillary pressure curve in microcosmic reservoir heterogeneity. Petroleum Geology and Engineering 20(3), 57–59.

32.

X.H.

, 2002. Hydrocarbon Reservoir Sedimentology in Clastic Stone. Petroleum Industry Press, Beijing, pp. 35–45.

33.

Zeng

L.B.

J.F.

and Li

Y.G.

, 2007. The relationship between fractures and tectonic stress field in the extra low-permeability sandstone reservoir at the south of western Sichuan depression. Journal of China University Geosciences 18(3), 223–231.

34.

Zeng

L.B.

and Liu

H.T.

, 2009. The key geological factors influencing on development of low-permeability sandstone reservoirs: A case study of the Taizhao Area in the Songliao Basin, China. Energy Exploration and Exploitation 27(6), 425–438.

35.

Zheng

J.M.

and Pang

, 1989. Diagenesis Research of Clastic Reservoirs. China University of Geoscience Press, Wuhan, pp. 50–55.

36.

Zhang

L.H.

Zhou

C.C.

Liu

G.Q.

Liu

Z.H.

and Zhang

, 2007. Origin and property differences of various types of low porosity and low permeability reservoirs and well logging evaluation strategies. Petroleum Exploration and Development 34(6), 702–710.

37.

Zhou

Wang

and Zhao

, 2007. New formula for acid fracturing in low permeability gas reservoirs: Experimental study and field application. Journal of Petroleum Science 59 (3–4), 257–262.

38.

Zhu

G.H.

, 1992. Origin and evolution and prediction of porosity in clastic reservoir rocks. Acta Sedimentologica Sinica 10(3), 114–132.

39.

Zou

C.N.

Tao

S.Z.

Zhang

X.X.

D.B.

Zhou

C.M.

and Gao

X.H.

, 2009. Geologic characteristics, controlling factors and hydrocarbon accumulation mechanisms of China's Large Gas Provinces of low porosity and permeability. Sci China Ser D-Earth Sci 52(8), 1068–1090.

40.

Zou

D.J.

and Yu

X.H.

, 2008. Characteristics and petrophysics experiment of low porosity and low permeability sandstone reservoir. Petroleum Geology and Engineering 22(1), 12–14.