The remaining resources in the southern Songliao Basin are mainly tight oil from the Fuyu reservoir source,with large resources,low vertical well production,unmatched technologies and difficult utilization of benefits.Therefore,it is of great significance to carry out in-depth tight oil research for the development of the remaining oil and gas resources in the Songliao Basin.Through deepening the research on Fuyu reservoir lithologic reservoir distribution,understanding is obtained about a total of more than reservoir “full sunken with oil” deep basin reservoir and tight oil.A “trinity” accumulation mode is established(upper generation and below perservation,overpressurized hydrocarbon expulsion,flow backward accumulation),and under the guidance of this knowledge,breakthrough was made for lower limit of physical property of the Fuyu oil layer,showing good potential.Research about the evaluation standard of tight oil “sweet area” was carried out,forming comprehensive evaluation method for the tight oil sweet area(effective sand body prediction technology,“seven-feature” evaluation method for well logging,multi-parameter dessert evaluation method).It promoted the tight oil efficient development.Qianan tight oil test area was established,and 150 horizontal wells were drilled,which has accumulative oil production of 31.5×104t crude oil.The single parallel oil production is 15% higher than the design,and the development effect is beyond the expectation.The establishment of the key technical system for tight oil evaluation and development in the southern Songliao Basin provides effective technical support for the sustained and beneficial development of oil and gas resources in the basin,which provides a reference for the evaluation and development of tight oil in China.
Tang Zhen-xing, Zhao Jia-hong, Wang Tang-xu
. Evaluation and key technology application of “sweet area” of tight oil in southern Songliao Basin[J]. Natural Gas Geoscience, 2019
, 30(8)
: 1114
-1124
.
DOI: 10.11764/j.issn.1672-1926.2019.07.007
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