蒙特卡罗法计算石油地质圈闭（评价单元资源量），GRV是Gross Rock Volume。整个模拟过程如何给地质人员直观的显示出来，讲明白---**Title:**
MONTE CARLO SIMULATION
**Company/Logo Information:**
CNOOC nexen
A CNOOC LIMITED COMPANY
**Chart Description:**
**Top Row of Charts (Input Parameter Distributions):**
* Six individual charts are arranged horizontally, separated by "X" symbols, representing inputs to a process.
* Each chart is a combined histogram (bar chart) and a cumulative distribution function (line chart).
* **Chart 1: GRV**
* Type: Histogram and CDF.
* Axes: X-axis likely "Net Rock Volume [1e6 Acr-ft]", Y-axis likely density/probability.
* Distribution: Skewed right.
* **Chart 2: N/G**
* Type: Histogram and CDF.
* Axes: X-axis likely "Net to Gross Ratio [decimal]", Y-axis likely density/probability.
* Distribution: Approximately symmetric, bell-shaped.
* **Chart 3: Porosity**
* Type: Histogram and CDF.
* Axes: X-axis likely "Porosity [decimal]", Y-axis likely density/probability.
* Distribution: Approximately symmetric, slightly skewed left.
* **Chart 4: Oil Saturation**
* Type: Histogram and CDF.
* Axes: X-axis likely "Oil Saturation [decimal]", Y-axis likely density/probability.
* Distribution: Skewed left.
* **Chart 5: Oil Shrinkage**
* Type: Histogram and CDF.
* Axes: X-axis likely "Shrinkage Factor [rb/stb]", Y-axis likely density/probability.
* Distribution: Uniform.
* **Chart 6: Recovery Factor**
* Type: Histogram and CDF.
* Axes: X-axis likely "Recovery Factor [decimal]", Y-axis likely density/probability.
* Distribution: Skewed right.
* Labels: Each chart is labeled with the parameter name (GRV, N/G, Porosity, Oil Saturation, Oil Shrinkage, Recovery Factor) and likely units on the X-axis label (partially visible).
**Bottom Chart (Output Distribution):**
* Type: Cumulative distribution function (CDF) curve and a corresponding histogram.
* Represents the result of the Monte Carlo simulation.
* Axes:
* Y-axis: "Exceedance Probability" (Ranges from 0 to 1).
* X-axis: "Recoverable Accumulation size Oil [1e6 STB]" (Ranges from 0 to 200, with labels every 20 units).
* Curve: A downward sloping curve starting near (0, 1) and decreasing towards the X-axis.
* Histogram: Vertical bars correspond to the frequency distribution of the output values.
**Text Content (Bullet Points):**
* Monte Carlo simulation performs a repetitive calculation based on random sampling of input parameter distributions.
* The volume equation is calculated over and over using different combinations of parameter values.
* The fractiles method is used to associate an exceedance probability with each volume.