Full
WU Xingneng,born in 1983,is a master and senior engineer. He is engaged in the research and evaluation of new logging technology processing methods. E-mail: wuxingneng-tlm@petroChina.com.cn.
Outline
Significant breakthroughs have been achieved in the Ordovician ultra-deep fault-controlled carbonate reservoirs in the Fuman area,Tarim Basin in recent years. This area is rich in oil and gas resources and has tremendous exploration potential,being one of the largest ultra-deep oilfields established in China at present. Nevertheless,the Fuman area has a deep burial depth and has undergone multiple tectonic evolution stages,leading to complex reservoir spaces and extremely strong heterogeneity. Thus,it is urgently necessary to clarify the characteristics of the reservoir spaces in the Yijianfang Formation of the study area and determine the types of reservoirs,establishing a logging identification method for reservoirs in a single well. Relying on geological data such as cores and thin sections,the petrological and reservoir space characteristics of the Yijianfang Formation were clarified,and four types of reservoirs were summarized: vug type,fracture type,fracture-vug type,and cave-type. With the aid of conventional logging and image logging data,the logging response characteristic chart of “conventional+imaging+pattern” was established. According to the image logging characteristics of different types of reservoirs,the technique of vug, cave and fracture stripping was utilized to achieve the identification of reservoirs in a single well and clarify the scale and physical property differences. The results indicate that the cave type reservoirs have a large scale and excellent physical properties,contributing mainly to oil and gas productivity. The fracture-vug type reservoirs have a medium scale and physical properties,serving as both an oil and gas migration channel and a storage space. The fracture type and vug type reservoirs have relatively poor scale and physical properties. Therefore,the cave type reservoirs are high-quality reservoirs in the study area and also the focus of current exploration and development. The research results provide a solution approach and technical support for the identifying Ordovician ultra-deep fault-controlled carbonate reservoirs in the Fuman area.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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