通过桶油DD&A变动公式保持和降低石油公司桶油成本

Maintaining and Reducing the Cost for a Barrel of Oil for Oil Companies through DD&A Variation Formula

桶油成本是衡量石油公司成本竞争力的重要指标．低油价下更是如此。完全桶油成本中较为可控的是桶油五项成本，其最主要构成为桶油折旧、折耗及摊销（简称桶油DD＆A），占桶油五项成本的55％左右，因此石油公司控制住桶油DD＆A基本就控制住了桶油成本的变化趋势。通过当期和次期桶油DD＆A计算公式推导，首次提出桶油DD＆A变动公式，并应用于某虚拟自营油气田。通过石油公司滚动预算和上市储量季度评估结果，可得知其当年预期产量、储量、公共设施及钻完井投资的情况，再结合下年度预算编制过程中下年度工作量、开发和资本化投资规模情况，使用桶油DD＆A变动公式，通过Excel可以得出在不同工作量以及对应的产量规模、投资费用情景下使油气田次期桶油DD＆A维持当期水平的最低储量增长值，明确降低桶油DD＆A的努力方向，促使经济和油藏工程师共同协作、优化组合，让上市储量评估与生产运营紧密地联系起来，从而达到维持并降低桶油成本的目的。

The cost for a barrel of oil at low oil price.Five-cost for a barrel is an important index of cost competition of oil companies ,especially of oil may be controlled in the complete cost for a barrel of oil, which consists of depreciation,degradation and amortization for a barrel of oil mainly （DD＆A for a barrel of oil for short） , accounted for about 55%.So the control on the DD＆A for a barrel of oil for the oil companies equals to the control on trend of the cost for a barrel of oil.After the DD＆A formula in the current period and next period was deduced,DD＆A variation formula for a barrel of oil was proposed first and applied to certain virtual self-operated oil and gas field.Expected production,reserves,public facilities and investment for well completion and drilling in those years may be known according to the roiling budget and quarterly as- sessment results of the SEC reserves for oil companies.Combined with work load,scale of development and capital investment during budgeting for next year,the minimum reserve increment for the DD＆A for a barrel of oil remains for the next period as the current period may be obtained through Excel and DD＆A variation formula for a barrel of oil at the conditions of various work load,corresponding production scale and invest- ment cost.The direction of reducing DD＆A for a barrel of oil was clear.It promotes the co-operation and optimization of economic and reservoir engineers,and makes the SEC reserves assessment and operation be connected closely ,which will achieve the goal of maintaining and reducing the cost for a barrel of oil.