貯留層の水理学における静的均衡と動的均衡 ;:傾斜油(あるいはガス)/水接触面に注目して
スポンサーリンク
概要
- 論文の詳細を見る
An oil (or gas)/water contact in an oil and gas field is normally horizontal because of a gravitational control in a petroleum trapping mechanism. Inclined contacts, however, have been observed in a significant number of fields. The Cushing gas-oil field discovered in 1912 in the Central Plateau, Oklahoma, USA, is the first example of the field with the inclined contacts. After the Cushing discovery, many fields of inclined contacts have been discovered in the Great Prairie of USA. The inclined contacts of these fields are caused by gradients of hydraulic heads ; the gradient is caused by a difference between an altitude of mountainous areas (recharge areas for aquifers) and a depth of subsurface aquifers (reservoir at a field in the prairies). Since 1990, oil and gas fields with the inclined contacts have been found in marine environments. The Peciko gas field is the example from the Mahakam Delta Province, Indonesia. A number of oil and gas fields with the inclined contacts have been discovered in the North Viking Basin. The marine type of inclined contacts should be considered to be controlled by lateral gradient of pore-pressures. The gradient is caused by a lateral transfer of overpressures from neighboring, stratigraphically-underlying, overpressured formations.Hubbert (1953) proposed hydrodynamic mechanism of entrapment of oil and gas fields associated with inclined contacts. The theory has been the most commonly accepted theory for inclined contacts ; a flow of formation fluids hydrodynamically causes a gradient of hydraulic heads that inclines the contacts. Hydrodynamic effect on the gradient, however, should be estimated to be negligible based on a series of model calculations of the velocity heads and friction loss heads. It is because a rate of subsurface flow through aquifer (reservoir) is too small to cause a sufficient magnitude of hydrodynamic effect.
- 石油技術協会の論文
石油技術協会 | 論文
- 地震波シミュレーションが地下構造探査に果たす役割
- インバージョンテクトニクス
- 最近の探鉱プレイへの構造形成モデルの貢献
- 堆積盆地の地史情報に基づく沈降モデルと構造形成--日本海東部と中国北部湾を例にして (第55回石油技術協会総会地質・探鉱部門シンポジウム--堆積盆地評価とその応用)
- 東北裏日本海域における石油の生成と移動の時期 (「石油の生成と移動の時期」シンポジウム特集号)